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rectangles
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  矩形
     Enumeration of Coverings of Labeled Rectangles by 1×k Rectangles
     标号矩形被1×K矩形复盖的计数
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     In this paper, We prove that (1) a Tychonoff Space X is mesocompact if and only if every binary open cover of X×βX has a Compact - finite refinement by open rectangles, (2) A regular Space X is mesocompact if and only if every binary open cover of X× 2L(X) has a compact-finite refinement by open rectangles.
     本文证明:(1)全正则空间X是中紧的当且仅当X×βX的任何二元开覆盖都有紧有限的开矩形加细,(2)正则空间X是中紧的当且仅当X×2~(L(x))的任何二元覆盖都有紧有限的开矩形加细。
短句来源
     By this method, R-tree data organization was implemented by typical points approach in which spatial objects were replaced with their minimum boundary rectangles, and some performance targets such as covering, overlapping and boundary perimeter were modified to improve its query efficiency.
     该方法用典型点法进行静态R树数据组织,用空间对象的最小约束矩形代替空间对象本身进行空间聚类计算,形成若干聚类,并以R树的构建规则进行适当调整,同时通过改进R树的一些性能指标如覆盖区域、重叠面积和边界周长等提高其查询性能。
短句来源
     The Coons Patches over Rectangles and Hermite Interpolating Patches
     矩形域上的Cr-Coons曲面及Hermite插值曲面
短句来源
     CONVERSION BETWEEN B(?)ZIER RECTANGLES AND B(?)ZIER TRIANGLES
     Bézier曲面在三角域和矩形域上的互化
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  矩形的
     The Algorithm for Transforming Center-hollowed Polygon in CIF Format into Rectangles in PG3600 Format
     CIF格式挖空多边形切割为PG3600格式矩形的算法
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     A Method of Camera Self Calibration Based on Rectangles
     一种基于矩形的摄像机自标定方法
短句来源
     A Dynamic Non-Interference Algorithm for Rectangles
     一种矩形的动态不干涉算法
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     By leading the concept of parallelogrem with property E and the concept of square with property E ,the authors find out the number of parallelograms with property E (parallelogram E for short) and the number of square with property E (square E for short)from inclusive i×j rectangles in m×n rectangles;
     通过引入具有性质 E的平行四边形和正方形的概念 ,求出 m× n矩形的内含 i× j矩形 . 它具有性质 E的平行四边形 (简称 E平行四边形 )个数 ,又具有性质 E的正方形 (简称 E正方形 )个数 .
短句来源
     A new algorithm which is used to transform center-hollowed polygons of CIF format in microlithography pattern into rectangles of PG3600 format is presented.
     给出了一种微光刻图形CIF格式的中间挖空多边形切割成PG3600格式所需矩形的新算法。
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  “rectangles”译为未确定词的双语例句
     The image (768×576 pixels) was divided into rectangles(16×16 pixels).
     研究中将图像分成无重复的纹理区块(16×16象素)。
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     The two-dimensional identical rectangles packing problem is to pack the maximum number of identical small rectangles of size a × b (including b × a) into a large rectangle X × Y.
     由于某些条件的限止,有时要求货物只能按一个重力方向进行装箱,从而使装箱问题变为把尺寸相同的2维盒子(a×b)填装到一个2维箱子X×Y中.
短句来源
     The 2(Object: one object vs.two objects)× 2(Location: short vs. long distance between two rectangles)× 3(Cueing: valid,inside-invalid or outside-invalid)within-subject experiment design was employed.
     实验采用2(两种物体)×2(两种空间)×3(有效线索、物体内无效线索和物体间无效线索)的被试内设计。
短句来源
     Defined a general Sierpinski carpet. Let S m be a general Sierpinski carpet with compression ratio 1/m(m≥4), S n be the set of n -th order elementary rectangle to produce S m,U be a subset in R 2 with diameter |U| >0, α n(U )denotes the number of the elementary rectangles intersecting Uin S n .
     引进泛 Sierpinski地毯的概念 ,设 Sm为压缩比为 1 /m( m≥ 4)的泛 Sierpinski地毯 ,Sn 为Sm 的第 n级基本长方形的集合 ,U为平面点集 ,U的直径 | U| >0 ,αn( U)表示 Sn 中与 U相交的基本正方形的个数。
短句来源
     On the Existence of Regular Permutations, Classical Magic D—Rectangles and Pandiagonal Magic D—Cubes
     关于正则排列、经典幻D矩和经典全对角线幻D体的存在性
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  rectangles
[6] regarding boundedness of maximal functions with respect to rectangles of lacunary directions, and prove a result regarding the cardinality of subsets of arithmetic progressions in sets of the type described above.
      
The necessary condition on the weight is similar to the Ap condition but involves rectangles (instead of cubes) arising from a covering of a star-shaped set related to Ω.
      
It has been proved that if a rectangle is dissected into three congruent pieces, then those pieces must themselves be rectangles.
      
Orthogonal packing of rectangles in a semi-infinite strip and its representation by block structures, which reduces the problem to a special linear cutting problem, are studied.
      
An exact solution is constructed to the problem of the stationary flow of an incompressible viscous fluid in a straight tube whose section is formed by two connected rectangles.
      
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Occurrence of sporadic diseased plant centers during or after the bloomingperiod is considered as reliable indication of the current year's forthcomingoutbreak of late blight in a potato farm. Incubation period of each secondary infection being about 4 days,is ratherconstant during the blight epiphytotic season under Chahar conditions.The timeinterval between the appearance of initial diseased plant centers to final totalblight in a potato field varies greatly,however,not only from locality to localitywith different...

Occurrence of sporadic diseased plant centers during or after the bloomingperiod is considered as reliable indication of the current year's forthcomingoutbreak of late blight in a potato farm. Incubation period of each secondary infection being about 4 days,is ratherconstant during the blight epiphytotic season under Chahar conditions.The timeinterval between the appearance of initial diseased plant centers to final totalblight in a potato field varies greatly,however,not only from locality to localitywith different climatic conditions but also from field to field under similarclimatic conditions.Our data record a range of 18-42 days.Circumstantial eviden-ces indicate that this variation is due,on the one hand,to the rainfall whichinfluences the amounts of sporulation and the frequency of penetration of thepathogene,and on the other hand,to cultural and other factors that determinethe vigor and the rate of aging of the plant itself. Actual counts of lesions formed from secondary infection in the early periodof the spread of the disease in a potato field,reveal that their distribution bearsdirect relation with the direction of the prevailing wind.It is estimated that over90% of spores fall within a rectangle of 800 sq.m.around a diseased plantcenter along the loci of wind directions. On the basis of possible function of absorbed copper ions in the enhancementof plant resistance to late blight,field experiments have been conducted by using0.1 - 0.2% copper sulfate solutions as spray.Results show that spraying 2-3 timesat 7-10 days' interval,started soon after the appearance of diseased plant center,gives remarkable control of late blight and corresponding reduction of loss inyield.The copper sulfate spray,though less effective and stable in comparisonwith the bordeaux spray,has the advantage of being more economical and easierto apply.Further experiments with the pu:pose of modifying and improving themethod are in progress.

從馬鈴薯的開花期起可能在田间出现的晚疫病中心病株是本田當年病害即將大量發生的重要標誌。每次再侵染的潛育期,在張家口壩下地區的氣候下,大約4天。從病害的最初發現到全面枯死所經過的日期囚種種外界環境條件而有很大的差別,我們所觀察到的是18—42天。根據調查资料來推測,一方面,促進病菌孢子形成数量和侵入數量的雨水,另一方面,决定植株衰老速度的栽培條件,是這種差別的主要原因。田間再侵染所形成的病斑之分佈情况說明病菌孢子的傳播与風向有直接的關係。估計90%以土的孢子落在中心病株附近順着風向的800平方米的長方形面積上。根據馬鈴薯地上部吸收銅素以提高共抗病力的可能性,利用0.1—0.2%硫酸銅溶液作為噴射劑,在田间中心病株發現的時期開始每隔7—10天喷射共2—3次,可以顯著地降低晚疫病的為害,提高產量。這個方法在共效驗及穩定性上不如波爾多液,在藥劑費用的節省及施用的方便上則勝之?椒ǖ母牧己吞岣哒谶M一步研究中。

1、The constitution of the quick-growing and good harvest forest of Populus canadensis consists of the form of planting composition and planting distance. It de- termines the nursing and leaves' space, large or small, of forest tree, hence it in- fluences the amount of out-pat aud quality of timbers. There are differeut opinions to the proper constitution. To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different. The form of planting is sometimes square or rectangle....

1、The constitution of the quick-growing and good harvest forest of Populus canadensis consists of the form of planting composition and planting distance. It de- termines the nursing and leaves' space, large or small, of forest tree, hence it in- fluences the amount of out-pat aud quality of timbers. There are differeut opinions to the proper constitution. To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different. The form of planting is sometimes square or rectangle. Some countries adopt close plant- ing, and others adopt open. In general, square and rectangle are adopted in artificial forest of Populus canadensis, while triangle planting is rearly used. A tendeucy is to use close planting. There are 400 to 40,000 planting thocks in per hectare. The difference is 100--times. 3、The rational close planting of Populus canadensis is right triangle aud square, because in such condition the orown may be normally developed, and striaght bole maintained. In the oircumstances of the same planting distance, the right triangle planting site produces 15.5% more products than thesquare (planting). Populus canadesis is a very intolerant species with high adaptability and de- mands water more than fertilizer. As the climatical and soil conditions are favourable, especially water is available and guaranteed, the density of planting may be deter- mined according to the following factors: (1) In eccordance with the table of the average height and diameter of tree in relating to the planting distance, at the first intermittent cutting, to resolve the planting distance: As the average height and diameter of the tree is known, at the first intermittent cutting, the corresponding rational distance of the first planting will be then easy found out from the table. on the other hand, the square value of the normal growing crown is used as a standard to determine the nursing spare and planting distance. In the mean time the first intermittent cutting year may be ob- tained. (2) To find out the rational close of planting by means of the soil fertility and the intensity of managenient: When the condition of soil fertility and water is suitable and the intensity of management is high, the trees grow fast the crown clo- sure is quick, open stocked in first planting is all right, dsing 3.5 × 4--6 × 6 M. in distance. If the condition of site is not good the site should be planted first close then open, using 1.3 × 1 .5--3 × 3 M. in distance promoting the crown in early closure, then thinning and transplanting the seedlings to the open site or plan- ting shrubs or farm crops between the rows of planting. (3) To find out the rational close of planting by means of the year and stan- dard of planting stocks: At the same conditions of site and management, one year seedlings or slips are used in close planting. While 2--3 year seedlings, 3--4 meters in height, are used in open planting. First close planting then open, as the plant- ing stocks grow 1--2 years 1ater, the dense stocked seedlings should be thinned and transplanted in the near by planting area. Then both sites become open stocked forests.

加拿大杨速生丰产林的结构应着重研究杨林的配置方式和造林密度,因为它决定林木营养面积和叶面积你大小,从而影响椽木的产量和质量。作者建议采用正三角形或正方形配置,提倡稀植,每公顷277—714株,或者先密后稀,早期疏开。确定造林密度的因子,首先是依据第一次间伐时平均树商、平均胸径号造林密度关系表”确定造林密度,同时试用冠幅的平方值,作为计算林木营养面积的依据;第二是依据土壤肥力(特别土壤水分)专经营强度确定造林密度;第三是依据苗木年龄及规格确定造林密度。稀植加杨林,15年成林时,预计高达22米,胸径35厘米,每公顷木材蓄积量240—360立方米。

1、The constitution of the quick-growing and good zharvest forest of Populus canadensis consists of the form of planting composition and planting distance.It de- termines the nursing and leaves'space,large or small,of forest tree,hence it in- fluences the amount of out-put and quality of timbers.There are different opinions to the proper constitution.To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different.The form of planting is sometimes square or rectangle.Some...

1、The constitution of the quick-growing and good zharvest forest of Populus canadensis consists of the form of planting composition and planting distance.It de- termines the nursing and leaves'space,large or small,of forest tree,hence it in- fluences the amount of out-put and quality of timbers.There are different opinions to the proper constitution.To study it is very important. 2、In foreign countries the constitution of poplar forest is quite different.The form of planting is sometimes square or rectangle.Some countries adopt close plant- ing,and others adopt open.In general,square and rectangle are adopted in artifioial forest of Populus canadensis,while triangle planting is rearly used.A tendency is to use close planting.There are 400 to 40,000 planting stocks in per hectare.The difference is 100-times. 3、The rational close planting of Populus canadensis is right triangle and square, because in such condition the crown may be normally developed,and striaght bole maintained.In the circumstances of the same planting distance,the right triangle planting site produces 15.5% more products than thesquare (planting). Populus canadesis is a very intolerant species with high adaptability and de- mands water more than fertilizer.As the climatical and soil conditions are favourable, especially water is available and guaranteed,the density of planting may be deter- mined according to the following factors: (1)In accordance with the table of the average height and diameter of tree in relating to the planting distance,at the first intermittent cutting,to resolve the planting distance:As the average height and diameter of the tree is known,at the first intermittent cutting,the corresponding rational distance of the first planting will be then easy found out from the table,on the other hand,the square value of the normal growing crown is used as a standard to determine the nursing space and planting distance.In the mean time the first intermittent cutting year may be ob- tained. (2)To find out the rational Close of planting by means of the soil fertility and the intensity of management:When the condition of soil fertility and water is Suitable and the intensity of management is high,the trees grow fast the crown clo- sure is quick,open stocked in first planting is all right,using 3.5×4-6×6M. in distance.If the condition of site is not good the site should be planted first close then open,using 1.3×1.5-3×3M.in distance promoting the crown in early closure,then thinning and transplanting the seedlings to the open site or plan- ting shrubs or farm crops between the rows of planting. (3)To find out the rational close of planting by meaus of the year and stam- dard of planting stocks:At the same conditions of site and management,one year seedlings or slips are used in close planting.While 2-3 year seedlings,3-4 meters in height,are used in open planting.First close planting then open,as the plant- ing stOcks grow 1-2 years later,the dense stocked seedlings should be thinned and transplanted in the near by planting area.Then both sites become open stocked forests.

加拿大杨速生丰产林的结构应着重研究杨林的配置方式和造林密度,因为它决定林木营养面积和叶面积的大小,从而影响林木的产量和质量。作者建议采用正三角形或正方形配置,提倡稀植,每公顷277—714株,或者先密后稀,早期疏开。确定造林密度的因子,首先是依据第一次间伐时平均树高、平均胸径与造林密度关系表”确定造林密度,同时试用冠幅的平方值,作为计算林木营养面积的依据;第二是依据土壤肥力(特别土壤水分)与经营强度确定造林密度;第三是依据苗木年龄及规格确定:造林密度。稀植加杨林,15年成林时,预计高达22米,胸径35厘米,每公顷木材蓄积量240—360立方米。

 
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