2. 方形的。
n. 名詞 1. 【數學】二次方程式；二次項。
2. 〈pl. 作單數用〉【數學】二次方程式論。

1. 2 the theoretical values of the second virial coefficient are precisely fitted into some simple expressions. according to one of them, a new temperature function for the quadratic terms in cubic equations was derived : the function is simple, general, without acentric factor, truly predictive, theoretically sound, and applicable to all the van der waals - type equations

2將第二維里系數的理論值較精確地擬合為幾種簡單的表達式，並據此導出了立方型狀態方程中二次項溫度函數的新形式該式簡單、通用，不含偏心因子，具有真正的預測功能和堅實的理論基礎，原則上適用於所有vanderwaals型方程。

方差分量二次型估計及容許性
3. Introduce a quadratic agc control method to solve the problem 2 and 3

5 .數字信號處理器的上電引導實現問題。
4. For a class of quadratic finite element diseretization systems of an elliptic boundary problem with jump coefficients under the unstructured quadrilateral grids, we are concerned with two kinds of quadratic lagrangian finite element equations, by analyzing the relationship between the linear finite element and quadratic finite element basis functions, a hew amg method is designed

摘要針對一類帶間斷系數的橢圓邊值問題，在非結構四邊形剖分下，討論了兩種二次拉格朗日有限元方程的代數多重網格法，通過利用雙線性元和二次元基函數之間的表示關系，給出了一種新的網格粗化演算法和構造提升運算元的代數途徑。
5. The quadratic aperture of the cat's-eye diaphragm is imaged too large.

貓眼光欄的方形光孔成象太大。
6. In algorithms, classification algorithms are divided into two cases : one for known statistical distribution model and the other for unknown statistical distribution model. four classification algorithms, the bata - prime statistic model fusing quadratic gamma classifier, based on sar image rcs reconstruction and space position mode, on the mixed double hint layers rbfn ( mdhrbfn ) model and on the self - adapt fuzzy rbfn ( afrbfn ) model, are derived. the problems, including how to further improving the class ratio of the bayes decision, decreasing the dependence on the statistical model and directly providing the adapted algorithm with samples, are solved

提出了基於徑向基函數神經網路（ rbfn ）的雙隱層混合網路（ mdhrbfn ）模型，解決了標準神經網路在具體sar圖像地物分類中分類類別數目不夠和分類精度差的問題；提出了基於模糊推理系統的自適應模糊rbfn分類（ afrbfn ）模型，兼顧通用性與精確性，增強人機交互能力，進一步提高了演算法分類率。
7. A. douady had suggested to study dynamics of biquadratic polynomials. by definition, a biquadratic polynomial is the composition of two quadratic polynomials, so it is an even quartic polynomials which can be written as f ( z ) = z4 + az2 + 6, where a, b are parameters. it is easy to see that / has a critical point at 0 and two symmetric critical points at

A . douadv曾建議對雙二次多項式的動力系統進行研究，所謂雙二次多項式就是兩個二次多項式的復合，也即偶四次多項式，在一個線型共軛下可以記為fz ） = z ~ 4 + z ~ 2 + b ，這里o ， b是參數，點0是它的一個臨界點，另外還有兩個對稱的臨界點（ （ - a ） 、 2 ） ~ 2 。
8. The canonical form of extended quadratic form

廣義二次型的標準形
9. The quadratic equation algorithm utilizes spa, dpa and principle of rsa - crt, converts the complicated prime factorization of a large composite number into finding the solution of a quadratic equation and gains the private key at last

該方法綜合利用spa 、 dpa攻擊手段和rsa - crt演算法原理，將rsa演算法的大數分解難題轉化為以私鑰p或q為解的二次方程，最終獲取演算法私鑰值。
10. Predictor - corrector smoothing methods for convex quadratic programs

凸二次規劃的預估校正光滑演算法
11. First the sketch / datum plane is fitted by least - square distance, then the extruded direction or axis with the flank points of the cloud is extracted in quadratic paogramming arithmetic, and certain points projected to gain 2d sketched datas. feature points are defined to segment the sketch datas, and the sketch profile is generated by fitting separately the line and circle segment

使用最小二乘方法擬合草圖基準平面，採用二次規劃方法提取拉伸方向和旋轉軸線，然後將數據點投影以獲取草圖數據，通過柵格劃分提取草圖邊界輪廓數據，再對這些邊界數據進行基於特徵點的分割，以直線和圓弧段擬合出草圖輪廓。
12. Every function whose derivative is linear is a quadratic function.

任意一個導數為線性函數的函數都是二次函數。
13. Note of divisibility of determinants of quadratic matrices on gcd - closed sets

關于最大公因數閉集上平方矩陣的行列式整除性的注記
14. Some quadratic equations have no real roots.

某些二次方程沒有實數根。
15. This paper discussed the application of theories about advanced algebra in the factorization of multinomial, introduced some application methods, acquired the methods of judging if a multiple quadratic multinomial can be factorized and how it is factorized, and thus solved the theoretical problem of the factorization of a multiple quadratic multinomial

摘要討論了高等代數理論在多元多項式分解中的應用，給出了若干應用方法，得到了多元二次多項式可分解的判別法和分解方法，徹底解決了多元二次多項式分解的理論問題。
16. A calculation formula for the quadratic gauss sums

一類高斯數值求積公式的極限性質
17. Gully tops class b 125, quadratic ; particulars

B 125級正方形雨水溝頂部.詳細數據
18. Gully tops class a 15, quadratic ; particulars

A 15級正方形雨水溝頂部.詳細數據
19. A kind of complete automatic subdivision method for mesh of hexahedron based on quadratic subdivision of tetrahedron was put forward and the corresponding program was developed

摘要提出了一種基於四面體二次剖分的六面體網格全自動剖分方法，研製了相應的程序。
20. The homological quadratic form in coalgebras

余代數上的同調二次型