長年變化 的英文怎麼說
中文拼音 [zhǎngniánbiànhuà]
長年變化
英文
secular variation-
The study investigated aboveground growths of caragana korshinskii and artemisia ordosica planted in four modes, revealing that in different planting modes their densities, heights and canopy width and biomasses remained unchanged or tended to decrease slightly ; the young shoots of a. ordosica annually grew in a s - shaped cure and the young shoots of c. korshinskii grew fast in spring and grew slowly or cease to grow from july on ; the biomasses and leaf area indexes of c. korshinskii and a. ordosica annually varied in a double peak curve and there were 8 annual plants that invaded in the four planting modes and formed higher coverage ; the quadrat with only a. ordoska appeared to have obviously lower coverage and biomass that the other three quadrats
摘要對騰格里沙漠東南緣2種人工植被檸條和油篙在4種配置方式下地上部分的生長動態進行了研究,結果表明:不同配置方式下它們的密度、高度、冠幅和生物量基本不變或略微呈下降趨勢;油篙新梢的年生長動態呈s型曲線,檸條新梢春季生長速度較快, 7月份以後生長速度緩慢或基本停止生長;檸條、油篙地上生物量和葉面積指數的年變化均表現為雙峰型, 4種配置方式下共有8種1年生植物人侵,並具有較高的植被蓋度;同其它3個樣地相比,純油篙樣地1年生植物的密度、蓋度和生物量明顯偏低。The annual variations of the longitudinal and latitudinal circle lengths demonstrate that the southern hemisphere appears to be expanding, while the northern hemisphere looks like contracting
計算地球經、緯圈長度的年變化率表明,南半球在擴張,北半球在收縮。Long - term changes in orthophosphate phosphorus in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域正磷酸鹽磷含量的長期變化pdfLong - term changes in chlorophyll - a in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域葉綠素- a含量的長期變化pdfThe precipitation frequencies is analysed according to 1956 ~ 2000 years of rainfall record series in baoding area. the features of distribution of rainfall are detailed evaluated. firstly, the distribution of monthly precipitation is not even. for instance. the annual rainfall amount is about 548mm in whole year, about 80 % of them in summer season. secondly, yearly variation of rainfall is greater. thirdly, the abundant years usually are followed by short years, but the important changes have taken place in the last decades. before 70 ' s the abundant years took the dominant position, from the 70 ' s to the middle of 80 ' s the short years took place more frequently than ever. after the later of 80 ' s, the short years hold the main position. the above knowledge is instructive for guiding the rainwater resources effective utilization
本文利用1956 2000年保定市的長系列降雨資料,對保定市降水量進行了頻率分析、年內變化分析和多年變化分析,明確了保定市降水量年內、年際間的變化情況:保定市降水量年內分配不均,汛期( 6 - 9月)占年降水量的81 。保定市降水量年際間變化大,豐水年和枯水年交替發生, 70年代以前以豐水年段為主; 70年代到80年代前期降水量豐枯交替頻繁,總的接近於枯水年段; 80年代後期至今以枯水年段為主。這種降水分佈規律對農業生產雨水資源的高效利用具有重要的指導意義。Then the paper investigated the regularity of different oil indices using time series statistical analysis method, which suggested that there are some regular components in it, including long - term secular trend, seasonal component and long - term cyclical component. the irregular component also plays an important part in it, mainly including the policy of opec, war, all kinds of international convention for the prevention of pollution from tankers and so on. and then a study of simulation and forecasting performance of arima time series model was conducted to crude oil indices, evidence shows that arima model performs better, especially for short - term forecasting
在此基礎上,本文以時間序列分析作為基礎研究手段,以德國海運費率指數公布的1980年1月至1999年12月的四類油運費率指數為研究對象,分析了四類油運費率指數的長期變化趨勢、季節變化規律、長期周期循環變化規律和不規則變化規律,並應用arima時間序列模型對160000dwt以上的原油運費率指數進行了短期預測,取得了較好的預測效果。However, every aspect has different developmental condition, with activity being the most stability factor and other four aspects having greater variabilities across ages
情緒性、反應性、社會抑制和專注性均隨年齡增長而變化發展,其轉折年齡各有不同。 4Long - term changes in total inorganic nitrogen in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域總無機氮含量的長期變化pdfThe annual averages of the density of phytoplankton and chl. a showed two peaks. the abundance of phytoplankton remained dominant from july to october in 2001, and gradually decreased from october in 2001 to february in 2002. the density began to rise from march, and up to the peak in april
浮游植物的總細胞數和葉綠素的周年變化模式為雙峰型, 2001年7至10月是浮游植物的夏季高峰期,此後直到2002年2月浮游植物豐度逐漸降低,浮游植物從3月開始增長,至4月達到浮游植物的春季高峰,之後浮游植物異常減少,導致2002年夏季的低谷。Long - term changes in nitrate nitrogen in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域硝酸鹽氮含量的長期變化pdfThere are 6 dominant spatial patterns : same distribution allover the country ; the seesaw between the regions of south of the yangtze river and mid - lower reaches of the yellow river ; the seesaw between the regions over the yangtze river and the yellow river and the south part of south china ; coherent variations over the yangtze - huaihe river basin and north - east china and opposite variations in the regions of north china and north - west china and south - east part of china ; the seesaw between the east part and the west part of china ; coherent variations over mid - lower reaches of the yellow river and south china and opposite variations in the yangtze river basin
近44年來我國逐旬降水量年變化特徵主要存在六種空間分佈型:全國大范圍地區年變化特徵一致的分佈;長江以南地區和黃河中下游地區降水量分佈相反;長江、黃河流域和華南沿海降水量分佈相反;長江、淮河流域和東北地區與華北、西北和東南沿海降水量分佈相反;我國東西部地區降水量分佈相反;長江流域與黃河中下游和華南降水量分佈相反。Then the long time change feature of radiation climate over china is analyzed - the results show that, the radiation climate changes a little before 1950s. from 1950s to 1970s it is increasing, and it reached the apex in the 1970s. later it began to decline, up to the present
通過總輻射年值的10年滑動平均曲線和累積距平曲線可以得到我國太陽總輻射氣候長期變化的趨勢特徵是: 50年代以前,我國的總輻射比較平穩,沒有大的變化;在50年代前後,總輻射開始呈現增長的趨勢;在整個的70年代,總輻射達到最高; 70年代末80年代初的時候,總輻射又開始了下降的趨勢。Long - term changes in ph in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域酸鹼值的長期變化pdfLong - term changes of physical development for children and adolescents in shandong
山東省兒童青少年生長發育及體質的長期變化Long - term changes in e. coli in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域大腸桿菌含量的長期變化pdfOn the premise of the study about the developing of xi ' an city ' s water supply and the great variety in water supply and the shortage of water resource, aiming for the furthest benefit from the configuration of water supply source of xi ' an city and facilitating it ' s development, this paper analyzed the characteristics of water supply sources and its changing quantity, the rising demand of water in city and the situation about water supply source, studied the problem about water supply via a variety sources, raised the principles of optimized configuration of variety sources, built the model of water demand forecasting and optimized configuration, studied the configured plan and its managing pattern
本論文從研究西安市城市供水的發展過程入手,重點分析了城市供水水水源和城市用水需求增長的變化特點,在城市供水狀況相當長的時期內將表現為供大於求的重大變化和西安市資源性缺水的現實沒有改變的背景下,以實現最大限度地發揮城市供水系統的作用合理配置緘市供水水源,促進西安社會經濟的持續、快速、健康發展的總體目標,研究了運用多水源科學合理的供水問題。分析了西安市城市供水水源狀況、用水量變化特點以及各水平年需水量,提出了多水源優化調配的原則,建立了需水預測模型與優化調配模型,初步研究了西安市城市供水水源合理配置方案和相應的管理模式。The programme entered the second phase in 1992, which is an on - going programme so that any long term changes in the environmental radioactivity can be determined
第二階段的環境輻射監測計劃在一九九二年展開。這是一項持續進行的計劃,目標是監測香港環境放射性水平的任何長期變化。Long - term changes in temperature in marine waters of hong kong, 1986 - 2005
一九八六至二零零五年香港海域海水溫度的長期變化pdfThe analysis of the probability of maximum temperature in south china during the summer of 2003 revealed that this event can ' t be considered as a reflection of long time trends, but rather than an episode under interannual variability
分析最高氣溫的概率分佈特徵,得出2003年夏季江南、華南地區出現的極端酷熱天氣,只是年際變化的表現,而不是長期變化趨勢的反映。The assistant director of the hong kong observatory, mr yeung kai - hing, said, " while the sea levels and their inter - annual variations at various parts of hong kong waters are not all the same, the long - term sea level change at the victoria harbour agrees well with that in the south china sea
香港天文臺助理臺長楊繼興指出:本港各水域的海面高度及年際變化都不盡相同,而維多利亞港海平面的長期變化與南海海平面的變化相當一致。分享友人