抽樣單元 的英文怎麼說
中文拼音 [chōuyàngdānyuán]
抽樣單元
英文
sample unit-
Multistage sampling in forest inventory is not restricted to fixed-area sampling units.
森林資源清查中，多階抽樣並不局限於固定面積的抽樣單元。This converter includes not only analog parts such as the bandgap voltage reference, voltage pump, sample / hold unit, one bit comparator of high precision, multiply - by - two and difference unit, but also digital parts such as register and multiplexer. so the design of this type of converter is mixed signal design
模數轉換器的內部電路包括基準源、降壓模塊、抽樣保持電路單元、高精度的1bit比較器、倍乘作差單元等模擬電路模塊，以及寄存器組、選擇器等數字電路模塊，屬于數模混合電路。First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by brewer, durbin, sampford, des raj, murthy, rao - hartley - cochran. then, at the basis of rao and bayless ' s study, we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super - populations, and compare the stabilities of estimators of the methods that given above. we find that the minor difference between two super - populations has great effect on the efficiency of the estimators for the population with moderately large coefficient of variation ( c. v. )
本文首先從理論上介紹了若干種不等概率抽樣方法，它們的估計量、估計量的方差及其估計，其中包括有放回ppz及pps抽樣，不放回不等概率抽樣中的brewer 、 durbin 、 sampford 、 desraj ， murthy 、 rao - hartley - cochran等人的方法；其次，在rao和bayless兩人就樣本單元數n = 2的情形對上述抽樣方法進行比較的基礎上，將總體隨機地分成兩個子總體，視每個子總體取自不同的線性超總體，在文中，我們利用計算機實現隨機分組，並通過畫圖比較各方法估計量的穩定性，結果表明，對變異系數c . v . （ x ）較大的總體而言，兩個超總體之間的微小差異將對估計量的穩定性產生很大的影響，從而說明rao和bayless的比較結果還不夠完善。If we can accurately ensure the rigidity coefficient, the result of mathematic analysis method can approach the fact accurately by applying contact mechanics theory, we can deal with the lining and lining as contact problem of two bodies. using pretension bolted solid finite element simulate bolt at linings. thus not only considers perpendicular rigidity but also considers the tangent contact rigidity
（ 4 ）通過運用接觸力學的理論，將管片與管片的接頭抽象成為兩個體與體的接觸問題，在管片處的螺栓採用有限元中的實體螺栓預緊單元進行模擬，這樣不但考慮了管片與管片處的法向剛度接觸而且考慮了管片與管片間的切向接觸剛度。A type of probability sample in which aggregations of sampling units, called clusters, are sampled at some stage in the process
是一種將樣本單元聚集在一起的隨機抽樣法.樣本群在抽樣的某一步驟被抽出In addition, the concept of scene centriod is introduced to represent video scene by averaging of all key frames inside a group of shots in the given video scene, which makes an audacious attempt for high - level video unit extraction and representation ; 4 ) according to the given sample video, shot and scene - based video retrieval methods are discussed respectively, and the evaluation pricinples are also discussed
進而，討論了由場景中一組鏡頭的關鍵幀的質心表示場景關鍵幀，即場景質心的方法，從而為抽取高層的視頻數據單元做出了大膽的嘗試； d ）從給定樣本視頻出發，分別討論了基於鏡頭和場景的視頻檢索方法，並分析了檢索性能評價的準則。A collection of product units bearing identification and treated as a unique entity from which a sample is to be drawn and inspected to determine conformance with the quality criteria
帶有相同標記的產品單元的集合，被看作是獨特的一個實體，可從其中抽出一個樣品來檢驗以確定與質量標準的一致性。According the above objectives, the topics of the course include the introduction of statistics, the data collection, sampling and distribution, estimation, and correlation & regression
為達上述目標，本課程之主要上課單元有：統計學的定義與重要性、統計資料的?集與整理、機率與抽樣分配、估計、相關與?歸分析等。Standard practice for minimum set of data elements to identify a soil sampling site
標識土壤抽樣基地用數據單元最低設置的標準實施規程( 2 ) the characters of the signal for the low voltage electrophoresis chip, signal processing theory such as the nyquist theory, fft, fir filter and the wavelet have been discussed after the learning of low voltage electrophoresis theory and the analyzing of the low voltage electrophoresis chip
2在深入了解重慶大學微系統研究中心研製的低電壓分離電泳晶元結構、原理、信號檢測方式的基礎上，分析了毛細管電泳晶元信號特點以及相關的數字信號處理方法（奈奎斯特抽樣定理、傅立葉變換、有限長單位沖激響應（ fir ）濾波器、小波變換） 。According to the characters of housing surveying, the quality elements of inspection are determined, the method of division of the sample unit is proposed to inspect the digital housing flat map, and the sample inspection themes are presented to check the housing surveying products. the normal theme is provided, and the detailed measures of inspection are established in js - gis
根據房產測量的特點合理確定了檢查驗收的質量元素，提出了適合於數字房產分戶圖檢查驗收的抽樣單元劃分方法，探討了適合房產測量的抽樣檢驗方案，並給出一般方案的選擇方法，制定了js _ gis中房產測量成果檢查驗收的實施細則。分享友人