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The algorithm is a deterministic pattern search algorithm, but in the search step of pattern search algorithm, the trial points are produced by a way like the genetic algorithm.


Singletrial EEG classification using inphase average for braincomputer interface


Communication signals should be estimated by a single trial in a braincomputer interface.


In order to find the effect of soil microbial biomass under different vegetation restoration models in this region, six trial sites located in Zhifanggou watershed were selected in this study.


Using this robot system in new car development and trial production, the cost and leadtime can be reduced substantially as compared with the conventional tool making method.

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 This is a continuation of a previous study (Li, L. Y, et al. 1951, Fukien Agr. Jour., 12(3, 4): 107112) on the outdoor culture of straw mushroom in Fukien. The present work includes: (1) investi gations on the analysis of fresh Fukien grown straw mushroom, (2) isolation and culture of Volvaria esculenta and our trials in using pureculture spawns to grow mushroom, and (3) preliminary obser vations made on the environmental requirements of Volvaria esculcnta The results are briefly summarized as follows:... This is a continuation of a previous study (Li, L. Y, et al. 1951, Fukien Agr. Jour., 12(3, 4): 107112) on the outdoor culture of straw mushroom in Fukien. The present work includes: (1) investi gations on the analysis of fresh Fukien grown straw mushroom, (2) isolation and culture of Volvaria esculenta and our trials in using pureculture spawns to grow mushroom, and (3) preliminary obser vations made on the environmental requirements of Volvaria esculcnta The results are briefly summarized as follows: 1. Our analytical work shows that the straw mushroom con tains 92. 39％ water, 206. 275mg. of ascorbic acid in 100g. of fresh mushroom, 2. 6024％ sugar, 2. 6603％ protein, 2. 2406％ oil, and 0. 9118％ ash. 2. Pure cultures of Volvaria esculenta could be readily obtained by innoculation with spores from fresh unopened mushroom. Cultures grow well on potato, corn, rice and ricekernel husk media. 3. By employing pureculture spawns, it takes only ten days for the first appearance of mushroom after spawnning while it takes three weeks usually if mixed cultures are used instead. The total period of mushroom production is likewise prolonged by the use of pureculture spawns. 4. Preliminary observations indicate an atmospheric tempera ture of 70°to 80°F., and a humidity of above 80% are favorable for the growth of straw mushroom. Production of mushroom stops when the atmospheric temperature falls below 70°F. The period of outdoor culture in Fcochow is from the latter part of April till the end of October.  本文旨在介绍草菰的营养价值,纯种培植的方法,及草菰生长状况。经分析结果,草菰的营养价值较一般蔬菜为高,尤以丙种维生素更为丰富。用纯种培植草菰较普通方法培植的不仅可以提早一半时间出菰,且产菰日期延长,菰之产量亦提高一倍。草菰生长速度从菰纽露面至菰伞平张需经过四十八小时,采为食用,以在菰疱破裂后十小时左右采收为佳。  Although James and Coolidge (1933) solved the molecular hydrogen problem in almost complete agreement with experiment by using a 13term 2electron eigenfunction, his method can hardly be applied to more complex molecules. For this and other reasons (Coulson, 1938), it is still desirable to obtain a good oneelectron eigenfunction, i.e., molecular orbital, for the hydrogen molecule. The best molecular orbital treatment available in the literature was given by Coulson (1938), who used a trial eigenfunction... Although James and Coolidge (1933) solved the molecular hydrogen problem in almost complete agreement with experiment by using a 13term 2electron eigenfunction, his method can hardly be applied to more complex molecules. For this and other reasons (Coulson, 1938), it is still desirable to obtain a good oneelectron eigenfunction, i.e., molecular orbital, for the hydrogen molecule. The best molecular orbital treatment available in the literature was given by Coulson (1938), who used a trial eigenfunction in elliptical coordinates involving 5 parameters and obtained 3.603 eV for the binding energy of H_2, which is to be compared with the ex perimental value of 4.72 eV. In the present investigation we have proposed a new type of trial eigenfunction for the molecular orbital: (1) with p = centers a, b, g, c, d,…… i = electron 1 or 2 (2) where the p's are centers along the bond axis ab (Fig. 1). In this simple problem both the Fock and Hartree methods yield the same result. The molecular orbital ψ must satisfy the following integral equation: (3) where ε is the energy of the molecular orbital, F is the Fock operator which is equal to H+G(1), while H is the oneelectron Hamiltonian operator: H = 1/2▽~21/r_a1/r_b (4) and G(1) is the interaction potential (5) Substituting (1) into (3), we obtain the linear combination coefficients c_p, which must satisfy the following secular equation: (6) where is the solution of the secular determinant and The F_(pq)'s are not at first known, but depend upon the c_p's. A method of successive approximation must therefore be adopted. A set of c_p values may be assumed, the F_(pq)'s calculated, the secular determinant (7) solved, and a new set of c_p values found. This process is repeated until a "selfconsistent" set of c_p values is obtained. The above procedure was first proposed by Roothaan (1951), not for H_2 but for more complex molecules. It was called by him the "LCAO SCF (linear combination of atomic orbitals selfconsistent field) method". The new feature of the present investigation is that we not only use LCAO but also LCNAO (linear combination of nonatomic orbitals, such as x_g, x_c, x_d, …). The order of secular determinant (7) may be reduced to half if we replace the eigen functions x_a, x_b .... by their symmetrical and antisymmetrical linear combinations x_a + x_b and x_ax_b. Numerical calculations have been carried out both for the three and the twocentered molecular orbitals. The threecentered molecular orbital is (10) (11) where S_(ab) and S(ag) are the overlapping integrals between x_a and x_b, and between x_a and x_g respectively. The parameters a and g have 'been obtained to give minimum energy by the method described above. They are a=l.190, g=0.22, and the binding energy is 3.598 eV, which is almost as good as that obtained by Coulson (3.603 eV) using a trial function of 5 parameters. The twocentered molecular orbital is (12) (13) which gives a maximum binding energy of 3.630 eV for a=1.190 and R~(ac)=R(bd)=0.105 (Fig. 1). This result is 'better than Coulson's. If we allow different values for the exponent α in x_a and x_g in equation (11), or if we use a fourcentered molecular orbital, such as ψ=a(x_a + x_b) + b(x_c + x_d) with four parameters, namely α_a=α_b, α_c=α_d, R_(ac)=R_(bd) and the ratio b/a, it is possible to obtain a still better result. Extension of the present method to the treatment of more complex molecules is now under investigation.  (1)討論了用自洽勢場多中心分子軌道法來處理H_2分子的一般方法。 (2)用僅含兩個參變數三中心分子軌道進行了具體計算,求得H_2分子的結合能為3.598eV,接近於Coulson用五個參變數的雙中心分子軌道所得的結果(3.603eV)。 (3)用不在原子核上的兩中心的分子軌道求得H_2分子的結合能為3.630 eV,此上述結果為好。並指出如用不同的α值和四個或四個以上中心的分子軌道,很有可能得到更好的結果。以上處理方法有可能推廣到比H_2更為複雜的分子。  During 1955 and 1956 the pine barkbeetle, Myelophilus Piniperda L., seriously injured pine trees on the hills near by KiangKan section at Hangchow, where the pine logs (firewoods)were piled for a considerable time before selling out. Most of the logs came down from Chien Teh (建德) and ZuengAn (淳安) along the Tsiang Tang River and were infested with immense number of the barkbeetle larvae. Results of study by the writers indicated that the serious infestation of pine shoots was due to spread of the beetles emerged... During 1955 and 1956 the pine barkbeetle, Myelophilus Piniperda L., seriously injured pine trees on the hills near by KiangKan section at Hangchow, where the pine logs (firewoods)were piled for a considerable time before selling out. Most of the logs came down from Chien Teh (建德) and ZuengAn (淳安) along the Tsiang Tang River and were infested with immense number of the barkbeetle larvae. Results of study by the writers indicated that the serious infestation of pine shoots was due to spread of the beetles emerged from the piles of log. The pine barkbeetle at Hangchow gave one brood a year, overwintering in pine shoots; up to late March and April they came down to the logs and dead woods in the forest, and made parent galleries between the bark and sapwood. The barkbeetle would take about a month to complete its life cycle. The results of trials and recommendations on control of the pest are given in the following: 1. Separate applications of 25％ DDT emulsion, 50％ wettable DDT and 6％ wettable 666 on the pine logs at a rate of 1:100 dilution still gave 68％, 82％ and 66％ mortalities respectively on the 20th day. Therefore it was suggested that spraying any one of the above mentioned chemicals three times at 20day intervals from late April to end of June would kill the emerged beetles. 2. To control the beetles in the pine shoots with 1: 60—1: 100 dilution of 6％ wettable 666 was quite promising. 3. Flaming the pine logs or dead woods in April or May (the breeding period of the barkbeetles) for 2 minutes gave 100％ mortality. Putting trap trunks in the forest and removering barks before transportation at Chien Teh and Zueng An were suggested.  1.松小蠹虫在杭州地区猖獗成災,主要是由于从錢塘江上游远來的松柴,攜带了大量的松小蠹虫幼虫而造成的;因此若能在松柴產地剝掉樹皮后,再行运輸是最有效的防治措施。2.根据初步观察此虫在杭州一年發生一代,新成虫在5月下旬到9月間为害当年生松梢;越冬成虫从3月下旬起离开越冬松梢,蛀進二年生松梢的梢端取食,并蛀入半枯死樹和衰老樹樹干或柴堆樹皮下產卵。3.为歼滅杭州地区松小蠹虫,根据試驗結果我們認为可采取下列几个措施:(1)自錢塘江上游运來的松柴在成虫未羽化前,進行噴藥,用1:100的25％DDT乳剂、50％可湿性DDT或6％可湿性666,每隔20天噴藥1次,以殺死羽化的成虫。(2)冬季1,2月间砍伐衰老松樹,在山区設置餌木誘集成虫產卵,然后集中处理,進行噴藥或燒灼。(3)新成虫的羽化盛期开始时,在松樹上噴射60—100倍的可湿性666液,毒殺为害枝梢的成虫以保护松樹生長。   << 更多相关文摘 
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