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delta     
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  三角洲
     Dynamic Variations of Subsurface Engineering Geological Environment on the Subaqueous Delta of Yellow River, China
     黄河水下三角洲表层工程地质环境动态变化研究
短句来源
     Comprehensive Study on Eco-Geology Environment in the Yellow River Delta
     黄河三角洲生态地质环境综合研究
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     Spatial and Temporal Changes of Soil Quality and Sustainable Utilization Evaluation in the Yellow River Delta
     黄河三角洲土壤质量时空演变及可持续利用评价研究
短句来源
     The Environmental Change and Degradation of Modern Yellow River Delta Coastal Wetland
     现代黄河三角洲滨海湿地环境演变及退化研究
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     Sexual Reproduction and Adaptability of Tamarix Chinensis (Tamaricaceae) in Yellow River Delta
     黄河三角洲柽柳(Tamarix chinensis)有性生殖过程及其适应性的研究
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  δ
     The Surface Delta Interaction and the Binding Energies of 1P_(1/2)-1P_(1/2) and 2S_(1/2)-2S_(1/2) Shell Nuclei
     表面δ力与1P_(1/2)-1P_(1/2)和2S_(1/2)-2S_(1/2)壳层原子核结合能
短句来源
     20-Bit Sigma Delta Serial A/D Converter AD7703
     20位Σ-Δ串行A/D转换器AD7703
短句来源
     Results: The proliferation of NS-1 cells could be obviously enhanced by 1 μmol/L of MENK (109.5%) and the effect of MENK could be reversed by anti delta opioid receptor monoclonal antibody (0.1-10 nmol/L).
     结果:1μmol/ L MENK可促进NS-1细胞增殖,促进作用达109.5%,而0.1-10 nmol/L的抗δ阿片受体单克隆抗体可抑制MENK的作用。
短句来源
     Let δ(S_α) be the delta function concentrated on S_α the sphere in R~p with cen- tre the origin and radius α>0. Then [δ(S_α),φ(x)] =∫_s φ(x)ds.
     设δ(S_α)为集中作用在S_α={||×||=α|α>0,x∈R~p}上的δ函数,其定义为: [δ(S_α),φ(x)]=∫_(S_α)φ(x)ds.
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     The inhibitory potency of dihydroe torphine against the binding of [3H]naloxone, [3H]DPDPE and [3H]etorphine (with mu and delta sites having been previously suppressed by 30 nmol / L morphine and 100 nmol / L DADLE) to homogenates of rat brain opioid receptors was studied.
     本文在大鼠脑匀浆P_2膜上,观察了二氢埃托啡(DHE)对[~3H]纳洛酮,[~3H]DPDPE和[~3H]埃托啡(预先用30nmol/L吗啡和100nmol/L DADLE阻断μ和δ受体)与阿片受体结合的抑制强度。
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  三角
     A Study of Coordinative Development between Environment and Economy and Application of GIS in the Pearl River Delta
     珠三角地区环境与经济协调发展研究及GIS技术应用
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     Study on the Internationalization Strategy of Manufacturing Enterprises in Yangtze Delta Metropolitan
     长三角都市圈制造业企业国际化战略研究
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     Experimental Study of Limit Cycle Flutter of a Delta Wing Model with External Store
     带外挂三角机翼极限环颤振的实验研究
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     To study the spatial distribution of atmospheric PCBs in winter Pearl River Delta, air samples were collected from 24/12/2001 to 16/1/2002 in urban, suburban and background of Guangzhou city.
     为了考察珠三角地区冬季大气中PCBs的空间分布,于2001年12月24日至2002年1月16日在广州的市区、郊区和背景区进行连续的空气样品采样.
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     Knowledge Economy and Township Economic Development in the Pearl River Delta
     知识经济与珠三角镇域经济的发展
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     Delta lambda was 70 nm, scan speed was 150 nm/min, excitation and emission slit width were both 10 nm, and determination wavelength were: B_2/448 nm, B_6/323 nm.
     通过条件实验,确定了最佳实验条件:波长差λ为70nm,扫描速度为150nm/min,入射和出射狭缝宽度均为10nm,测定波长:B_2/448nm,B_6/323nm。
短句来源
     Objective To construct delta Np63(ΔNp63) specific small hairpin RNA(shRNA) expression plasmid,and examine the inhibitory effects ofΔNp63-shRNA in 5637,a cell line of transitional cell carcinoma of the bladder (TCCB).
     目的构建Np63特异性短发卡RNA(shRNA)表达质粒,检测Np63-shRNA对膀胱移行细胞癌(TCCB)细胞株5637中Np63信使RNA(mRNA)表达的抑制作用。
短句来源
     Objective To investigate the expression and significance of delta p63(△Np63),a novel member of p53 gene family,in esophageal squamous cell carcinoma.
     目的探讨p53基因家族新成员截短型p63(Np63)在食管鳞癌组织中的表达及其意义。
短句来源
     Methods The research group included 152 subjects who were student at universities. CCR5 and CCR5 delta 32 mutation were detected by PCR and futher confirmed by DNA sequencing analyses.
     方法以152例壮族大学生为研究对象,应用PCR和DNA直接测序等方法检测CCR5及CCR532突变体。
短句来源
     A Novel Method of Double Delta Modulation on Tracking Control of PWM Converters
     PWM变换器跟踪控制的双重调制新方法(英文)
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  delta
Smooth Frame-Path Termination for Higher Order Sigma-Delta Quantization
      
We study the performance of finite frames for the encoding of vectors by applying standard higher-order sigma-delta quantization to the frame coefficients.
      
In this paper we review our some results about the strongly singular (discontinuous, measure, or delta function) problems for nonlinear hyperbolic equations.
      
The glass transition temperature and tan delta of bamboo were 30.5°C, 0.02 and 10.61°C, 0.04, when MC was 10% and 34%, respectively.
      
Response of reed community to the environment gradient-water depth in the Yellow River Delta, China
      
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The utilization of Trichogramma evanescens Westw. to control sugarcane borers ona large scale in Kwangtung, Kwangsi and Fukien provinces began in 1959. In thecolonized sugarcane fields the parasitization of host eggs ranged from 60 to 97.52 per-cent, the "dead-hearts" of shoots from 0.21 to 9.9 percent and the bored joints from2.01 to 11.8 percent, while in the check fields the figures ranged from 0 to 48.6 percent,1.7 to 22.1 percent and 11.45 to 18 percent respectively. Colonized fields showedhigher percentage...

The utilization of Trichogramma evanescens Westw. to control sugarcane borers ona large scale in Kwangtung, Kwangsi and Fukien provinces began in 1959. In thecolonized sugarcane fields the parasitization of host eggs ranged from 60 to 97.52 per-cent, the "dead-hearts" of shoots from 0.21 to 9.9 percent and the bored joints from2.01 to 11.8 percent, while in the check fields the figures ranged from 0 to 48.6 percent,1.7 to 22.1 percent and 11.45 to 18 percent respectively. Colonized fields showedhigher percentage of parasitized eggs, lower percentage of "dead-hearts" of shoots andof bored joints as compared with the check field. In order to maintain the efficiency of Trichogramma evanescens in controlling sugar-cane borers, the following suggestions are made for the prolification and liberation of thisparasite. (1) Use the native strain of parasites as parent stock for prolification. (2)Use the eggs of Attacus cynthia ricini Boisd. as factitious host.(3) A ratio of one to oneor two to one for the parasites and the factitious host eggs during prolification is desirable.(4) Let the parasites develop outdoors or under the condition of fluctuating tempera-ture. (5) Do not continuously rear the parasites more than ten generations; renew theparent stock frequently. (6) Liberate the parasites in advance of the numerical climaxof the host eggs in the field. (7) In the Delta area of the Pearl River in Kwang-tung province, liberate the parasites in cane fields seven to nine times per year andliberate 6,000 to 10,000 female parasites each time for one mou. (8) Use the methodof overlapping liberation of parasites. (9) Feed the adults with honey. (10) Controlthe natural enemies of parasite in the field. (11) Plant green-manure crop as mixedcropping in the cane field to improve the environmental condition for the existence of

利用赤眼蜂防治甘蔗螟虫,经长期研究试验及大面积生产实践的结果,放蜂区蔗螟卵寄生率提高1至10多倍,甘蔗枯心苗减少2-8成。绝大多数地区认为放蜂治螟有效。 繁殖赤眼蜂最好采取工厂生产的形式,在繁殖释放过程中,应注意下列事项:1.采用当地赤眼蜂品系作为繁殖对象。2.采用蓖麻蚕卵作为繁殖赤眼蜂的寄主。3.控制寄主卵内的寄生蜂数。4.使赤眼蜂在室外条件或变温条件下发育。5.避免赤眼蜂连续繁殖超过10代。6.蔗螟卵在田间未达最多时即开始放蜂。7.在广东珠江三角洲每年放蜂7-9次,每亩每次放蜂6,000-10,000头。8.采用重迭放蜂法。9.室内繁殖赤眼蜂及田间放蜂时都要用蜂蜜喂成虫。10.防御田间赤眼蜂天敌。11.在蔗田间种绿肥作物,使田间环境更适于赤眼蜂生存。

The boundary-value problems of the linearized supersonic conical fields of thin wings are reduced to the boundary-value problems of analytical functions. Instead of using perturbation velocity potentials as unknown functions[6,7], the n-th partial derivatives of perturbed velocity potentials are used as unknown functions[2]. It is found that the present method is mathematically simple and direct and, moreover, can be used when the boundary-value is an arbitrary homogeneous function.The cases of plane delta...

The boundary-value problems of the linearized supersonic conical fields of thin wings are reduced to the boundary-value problems of analytical functions. Instead of using perturbation velocity potentials as unknown functions[6,7], the n-th partial derivatives of perturbed velocity potentials are used as unknown functions[2]. It is found that the present method is mathematically simple and direct and, moreover, can be used when the boundary-value is an arbitrary homogeneous function.The cases of plane delta wings are discussed in detail. The lift and pitching and rolling moments of plane delta wings are calculated by theorem of residues. This technique is much simpler than direct integrations of the pressure distributions. The cases of cruciform triangular wings are also discussed.The present method can be generally used in the linearized supersonic conical flow problems of the first and higher order for the plane and cruciform wings, while the boundary conditions may be cither those of the direct problems, the inverse problems or the mixed problems.

本文在已有的超声速薄翼錐形流問題解法的基础上,提出了一种比較普遍适用而計算又比較簡便的方法。本文的方法是以扰动速度势函数对座标的n阶偏导数为未知函数,将問題化为解析函数的边值問題求解。利用解析函数的性貭,討論了利用留数定理来比較簡便地計算超声速后緣的三角形机翼的升力、俯仰力垣和滾轉力矩的方法。簡要討論了本文方法对十字形三角机翼問題的应用。 本文方法可以計算边界条件中齐次函数是任意齐次函数的情形,而不象某些文献中主要仅限于研究齐次函数是n-1次多項式的情形。这点在实际問題中也是有意义的,例如:具有錐形扭轉的三角机翼的一阶錐形流問題,机翼上各种操纵面的偏轉和运动問題,超声速边緣的問題以及某些升力抵消流場的問題等。 本文方法适用于比較普遍的情形:錐形流可以是一阶的,也可以是高阶的;机翼形状可以是平面形的,也可以是十字形的;边界条件可以是已知翼剖面形状,也可以是已知压力分布,或者一部分已知翼剖面形状而另一部分已知压力分布。 附录中討論了和正文有关的解析函数边值問題及其某些簡单的推广。

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere...

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere investigated at Nanking,Kiangsu during 1959-1962.(1)Combining ability between different interspecific crosses with special reference toyield,earliness and fibre qualities.(2)Morphological and physiological characters of economic importance in F_1 hybrids.(3)Performance of promising hybrids in field production.(4)Method of producing hybrid seeds with cheaper cost and less labour.Fifty-nine combinations were studied from 1960 to 1962,among which Pong-zai No.1(Upland cotton)×L.S.4923(Sea-island)was the best in yield and earliness.The averageyield of this F_1 hybrid in three years with 178 kg.of seed cotton or 53.7 kg.of lint cotton permow.As compared with the parents it was 94.35% of seed cotton or 82.2% of lint cotton ofthe yield of Delta-upland cotton and 187.17% of seed cotton or 172.74% of lint cotton of theyield of Sea-island L.S.4923.The fibre quality of F_1 hybrids approached Sea-island parent with a mean fibre length of40 m.m.,mean fibre fineness of 7000 meters per gram wt.,and single fibre strength of 4.5g.The methods and procedures for producing commercial hybrid cotton seed were as follows:(1)Hybrid F_0's seed was produced by hand emasculation and pollination which was ofvalue in areas abundant with hand-labor or adapted to transplanting for saving seeds up to4/5.(2)The female parent with recessive markers,was pollinated by hand without emascula-tion.In the thinning of the hybrid progeny all recessive plants were removed,leaving onlythe true F_1's.The recessive characters used for markers were virescent yellow foliage,redstem and hairy petiole of the seedling.The percentage of hybrid seed setting for differentupland cotton varieties ranged from 13% to 78%.Observations on heterosis in the characters of F_1 hybrids of G.hirsutum×G.barbadensewere summarized as follows:Plant Characters Comparison of bybrid with Upland and Seaisland parentsDays from planting to seedling Earlier than either parentDays from budding to flowering Intermediate nearer to earlier UplandDays from seedling to boll maturity Intermediate nearer to late Sea-island Days of bud development Intermediate nearer to earlier UplandDays of boll development Longer than Sea-islandDays from seedling to first boll maturity IntermediatePlant height Taller than either parentNumber of monopodia Less than either parent,but approaching Up landNumber of sympodia More than either parentNumber of fruiting points per plant More than either parentPosition of main stem nodes where first fruiting branch appears Lower than either parentInternode length of axis Longer than either parentInternode length of fruiting branch Longer than either parentPetiole length Longer than either parentLeaf area Larger than either parentLeaf lobe index Intermediate,approaching Sea-islandShedding percentage IntermediateDistribution of bolls in different parts of the plant Approaching Sea-island,most bolls setting at middle and upper parts of the plantWeight of seed cotton per boll IntermediateNumber of ovules per boll Approaching Sea-island in a lower numberMotes percentage More than either parentPistil length IntermediateCorolla area and index Larger than either parentSeed index Larger than either parentLint index IntermediateMaturity Intermediate,approaching late Sea-islandFibre length Longer than either parentFibre fineness Approaching Sea-islandYield in seed cotton Approaching Upland,higher than Sea-islandYield in lint cotton Lower than Upland,higher than Sea-islandProduction of dry matter More than either parentProduction of dry matter per square meter of leaf area More

1959—1962年试验证明,海陆杂种一代具有早熟、丰产、优质的特性。海陆杂种一代的籽棉产量接近陆地棉,而显著高于海岛棉。成熟期较海岛棉早,比陆地棉偏迟。生育特性一般介于两亲之间,不同程度的偏向于海岛棉,有的特性超过两亲范围以外。纤维细长,强度高,可以制成高挡纺织品。在江苏各地示范试种结果良好。在制种技术方面研究证明,采用具有某一隐性指示性状,进行不去雄杂交(人工辅助授粉),杂交率达70%,每工作日可制种6—8斤。

 
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