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  lumps of
     and when the sweet corn variety is Y1, the egg density of ACB is 18 or 35 lumps of egg per 100 corn plants, ACB can be controlled under EIL by releasing T. ostrininae or spreading nematode granules; and when the egg density of ACB reaches at 62 lumps of egg per 100 corn plants, both T.
     当甜玉米品种为粤甜 1号 ,卵密度为 18或 35 (块 / 10 0株 )时 ,在人工生态控制系统内释放玉米螟赤眼蜂或撒施线虫颗粒剂均可达到生态控制目标 ;
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     In similar chromatographic conditions their resolutions R_(Na)~+-k~+ and theoretical plate member N_(Na)~+ and N_K~+ are 3.06 and 1.16, 843 and 174, 2218 and 380 (ps/M) respectively.
     在相近的色谱条件下,其Na~+、K~+分离度R_(Na~+-k~+),理论板数N_(Na~+)、N_(k~+)分别为3.06和1.16,848和174,2218和383(块/米)。
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     Certain Properties of the Space of the Functions Generated by Block
     Block(块)生成函数空间的性质
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     (Block) H-matrices and Sub positive Definite Matrices
     (块)H矩阵与亚正定矩阵
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     In the phosphorus production from phosphorite (lump) by electric furnace method,the smashed or powdered phosphorite, which occupied 5% - 15% of raw mineral per MT phosphorus product, will be produced.
     以磷矿石(块矿)为原料,采用电炉法生产黄磷,每吨黄磷将产生原料的5%~15%的碎磷矿或磷矿粉。
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     1. Simple Criteria for (block)H-Matrices: we present sufficient conditions, which generalize and improve the previous results.
     1.(块)H矩阵类的判别条件:主要是给出了(块)H矩阵的充分条件,这些条件是已有结果的推广和改进。
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     Criteria for Block H-matrices
     H-矩阵的判定
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     Equivalent Conditions of Block H-Matrices
     H-矩阵的刻画
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     (3) free disc fragment.
     (3)游离骨
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     (4) measures for lowering the thrust bearing shoe etc.
     (4)降低推力瓦措施。
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  lumps of
These solutions are multisolitons represented byN prescribed lumps of the magnetic field, simulatingN identical particles in equilibrium, and are governed by a nonlinear elliptic equation with both vortex and anti-vortex source terms.
      
On the Discrete Spectrum of the Nonstationary Schr?dinger Equation and Multipole Lumps of the Kadomtsev-Petviashvili I Equation
      
In some areas, this had proceeded to the extent that the ganglia were isolated ovoid lumps of cells with no apparent connection to other ganglia.
      
Some nerves reached surviving lumps of myenteric ganglion cells.
      
Lumps of diatom-rich, laminated sediments were discovered redeposited and interbedded in a Late Weichselian delta sequence in a small glaciofluvial esker at Snickarekullen, south-western Sweden.
      
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Two types of under-water quartz transducers, namely, the mosaic type & the array type, were designed and manufactured, particularly paying attention to the points of cementing of crystals and supporting of vibrating bodies, with a view to reducing the equivalent resistance r of the transducers when they are unloaded. A transducer of the mosaic type with an area of 609 mm~2, unsupported, measured 60 k Ω for its r, while one of the array type with an area of 259 mm~2, 15 k Ω. Finally, discussions were made on...

Two types of under-water quartz transducers, namely, the mosaic type & the array type, were designed and manufactured, particularly paying attention to the points of cementing of crystals and supporting of vibrating bodies, with a view to reducing the equivalent resistance r of the transducers when they are unloaded. A transducer of the mosaic type with an area of 609 mm~2, unsupported, measured 60 k Ω for its r, while one of the array type with an area of 259 mm~2, 15 k Ω. Finally, discussions were made on the comparison of these two types of transducers with the conclusion that a transducer of the array type possesses more merits than that of the mosaic type. The ways for further improvements were considered.

我们设计了并制造了两种不同型式的水中用水晶机电转换器:(i)镶嵌型,(ii)叠片型;尤其注意于水晶片的胶合、振动体的支持等问题,其目的在于减少转换器在无负荷时的等值电阻r。测得一个面积为609平方毫米其支持点完全自由的镶嵌型转换器的r为60kΩ;又测得另一个面积为256平方毫米四水晶叠片型转换器的r焉15kΩ。再后讨论了两种型式转换器的优缺点,显见得叠片型的优于镶嵌型的很多,并进一步考虑了可能改进之点。

A new species under a new genus of the stbfamily Derogenetinae is described. The cirrus pouch is present and envelopes the upper portion of the curved seminal vesicle and the whole mass of prostate glands. The ventral sucker is situated in the posterior part of the ,body. The vitellaria are in a single and compact mass, located at the posterior extremity, and the eggs are provided with two long filaments at one pole. For the new genus and new species the name Chenia cheni is proposed.

本文把Derogenetinae亚科中之一新属及新种作一详细叙述。其主要特徵为(1)有阴茎囊包被貯精囊之上端及攝護腺之全部,(2)腹吸盤在体之中部稍近下方,(3)单卵黄腺在体之最末端,(4)在无卵蓋之一端具两條细长丝状体。擬名陈氏半尾吸蟲(Chenia cheni)为本亚科中之一新属及新种。

In connection with experiments on the control of the rice stem borer, aseries of observations were conducted in 1949 to 1952 in Canton to determinethe form of the distribution of the moth, the egg-mass and the larval popula-tions of this species. It was found that the moth and egg-mass populations inrice seed-beds are in essential agreement with the random distribution of thePoisson series. The larval population in spring-crop fields apparently conformsto the contagious and the negative binomial distributions....

In connection with experiments on the control of the rice stem borer, aseries of observations were conducted in 1949 to 1952 in Canton to determinethe form of the distribution of the moth, the egg-mass and the larval popula-tions of this species. It was found that the moth and egg-mass populations inrice seed-beds are in essential agreement with the random distribution of thePoisson series. The larval population in spring-crop fields apparently conformsto the contagious and the negative binomial distributions. The larval population during hibernation period appears to be neither of the random distribution norof the contagious type but agrees with the negative binomial distribution. The population distribution of the injured stems, characterized by the ap-pearance of "dead-hearts" and "white ears" was also studied. The "dead-hearts"popolation in autumn-crop fields conforms with the contagious and the negativebinomial distribution. The distribution of the "white ears" is not at random. It iseither in essential agreement with the contagious or with the negative binomialdistribution, depending on the size of the sampling unit. Based on the form of population distribution the questions of sampling tech-nique, the design of field experiments, the transformation of data for statisticalanalysis, as well as the habits and control of insects have been discussed inrelation to the rice stem borer. Since the populations of larvae and "whiteears" differ significantly from the random distribution, a new technique forsampling has been proposed. It is hoped that this may be useful in the investi-gations on the relative effectiveness of control operations and for census purposes.

(一)本文就昆虫常见的数种集团分布:潘松分布、核心分布和负二项式分布的公式、性质和例子等略加讨论介绍。 (二)我们在广州附近对三化螟各时期和白穗、枯心苗的田间分布型式作了初步的调查,所得结果如下: 1.螟蛾和卵在秧田上是随机分布的。 2.幼虫在本田分布不随机,符合核心分布和负二项式分布。 3.白穗在田间的分布不随机,1×1丛、2×2丛、……6×6丛各种取样单位型样本均符合负二项式分布,4×4丛、5×5丛和6×6丛三种取样单位型样本则更符合核心分布。 4.稻遗株内越冬幼虫分布不随机,亦不符合核心分布,但符合负二项式分布。 5.晚造本田枯心苗田间分布不随机,符合核心分布和负二项式分布。 (三)本文就昆虫集团分布型式的调查在实用上的意义,联系到三化螟来讨论,我们论及与虫害调查取样技术、田间试验设计、统计代换方法、昆虫生活习性和害虫防治等各方面的关系;其中取样技术方面,我们举出针对三化螟幼虫在本田和白穗不随机分布的取样新方法的尝试,希望对今后螟害调查工作有所帮助。 (四)最后,我们就一些昆虫分布的特殊问题加以论列,像密度对分布型式的影响,混合集团和环境因素的影响于昆虫集团分布类型等,就中说明了密度过大过...

(一)本文就昆虫常见的数种集团分布:潘松分布、核心分布和负二项式分布的公式、性质和例子等略加讨论介绍。 (二)我们在广州附近对三化螟各时期和白穗、枯心苗的田间分布型式作了初步的调查,所得结果如下: 1.螟蛾和卵在秧田上是随机分布的。 2.幼虫在本田分布不随机,符合核心分布和负二项式分布。 3.白穗在田间的分布不随机,1×1丛、2×2丛、……6×6丛各种取样单位型样本均符合负二项式分布,4×4丛、5×5丛和6×6丛三种取样单位型样本则更符合核心分布。 4.稻遗株内越冬幼虫分布不随机,亦不符合核心分布,但符合负二项式分布。 5.晚造本田枯心苗田间分布不随机,符合核心分布和负二项式分布。 (三)本文就昆虫集团分布型式的调查在实用上的意义,联系到三化螟来讨论,我们论及与虫害调查取样技术、田间试验设计、统计代换方法、昆虫生活习性和害虫防治等各方面的关系;其中取样技术方面,我们举出针对三化螟幼虫在本田和白穗不随机分布的取样新方法的尝试,希望对今后螟害调查工作有所帮助。 (四)最后,我们就一些昆虫分布的特殊问题加以论列,像密度对分布型式的影响,混合集团和环境因素的影响于昆虫集团分布类型等,就中说明了密度过大过 小时了解分布型式成为不必要的,因为极度的不均衡会回复为均衡状态的。

 
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