雜種制種 的英文怎麼說
中文拼音 [zázhǒngzhìzhǒng]
雜種制種
英文
hybrid seed production-
Fourth, the paper treats two kinds of hoisting projects of high alititude construction in bulk and member assembly, hositing machine and plan layout, setting up scaffold and joints, and installing trunks, branches and joints etc. then in detail discusses the method which applys total station to measure three - dimensional coordinate of dendriform structure, including selecting survey sign points, creating survey system and converting survey coordinate system etc. the paper also deep research on the welding performance, welding method, welding process, welding stress and control, welding strain and rectification, weld defects analysis and weld quality inspection, and so on complicated heterogeneity steel weld proplems
接著系統的論述了高空散裝法和分單元安裝法兩種樹狀結構吊裝方案，樹狀結構吊裝機械及平面布置，樹狀結構胎架及節點的搭設，以及樹狀結構樹干、樹枝和節點的吊裝工藝等諸多工藝問題。詳細的論述了採用全站儀對樹狀結構進行空間三維坐標測量的方法，包括測量標志點的選取、測量系統的建立及測量坐標的轉換等問題。深入地研究了樹狀結構可焊性、焊接方法、焊接工藝、焊接應力及控制、焊接變形及矯正、焊接缺陷分析及焊接質量檢查等復雜的異種鋼焊接問題。Low emasculate cause of hybrid maize production and its improve measures
雜交玉米制種去雄效果低的原因與提高措施Florescence calculation in hybrid maize production and adjust measures
雜交玉米制種花期預測方法與調整措施Broadcast period adjusting and florescence forecast methods of hybrid maize production
雜交玉米制種的播期調整與花期預測方法It is generally impossible to obtain the analytic optimal guidance law for complex nonlinear guidance systems of homing missiles, and the open loop optimal guidance law is often obtained by numerical methods, which can not be used directly in practice. the neural networks are trained off - line using the optimal trajectory of the missile produced by the numerical open loop optimal guidance law, and then, the converged neural networks are used on - line as the feedback optimal guidance law in real - time. the research shows that different selections of the neural networks inputs, such as the system state variables or the rate of los ( line of sight ), may have great effect on the performances of the guidance systems for homing missiles. the robustness for several guidance laws is investigated by simulations, and the modular neural networks architectures are used to increase the approximating and generalizing abilities in the large state space. some useful conclusions are obtained by simulation results
對于復雜的非線性導彈制導系統，很難求得其解析的最優制導律，只能求得開環的數字解，不能適用於具有時變不確定性的導彈制導系統.利用神經網路的學習和推廣能力，對開環的數字最優制導律進行離線的學習，作為閉環的神經最優制導律在線應用.研究分別選擇系統狀態變量和視線角速率等不同的神經網路輸入對制導系統性能的影響，以及各種制導律的魯棒性問題，並採用模塊化神經網路結構提高神經網路的學習和推廣能力，模擬結果得到一些有益的結論Abstract : the main characters and seed set of bc1 ， bc2 ， bc1f2 from ms line back - crossing with the pollen of hybrid rice were studied. the appearance of a large number of self fertile plants in ms line was analyzed. the effect of introgression of restoring genes on ms line purity and hybrid yield in indica and japonica rice was discussed. it was pointed out that “ iso - cytoplasm restorer line ” was seriously reducing the purity of ms line and that hybrid rice was unsuitable for isolation zone in the seed production fields
文摘:研究了雜交稻花粉對母本不育系回交後代群體bc1 、 bc2 、 bc1f2的主要農藝性狀和育性表現，分析了不育系中出現大量自交結實株的原因，討論了恢復基因滲入對秈、粳不育系純度和雜交稻產量的影響，指出「同質恢」對降低不育系純度的嚴重性和雜交稻作制種田隔離區的不合理性。Artificial hybridization technique for papaya seed production
番木瓜人工雜交制種技術Production technique of hybrid chinese sorghum jin
晉雜18號高粱雜交制種技術Improve quality measures to hybrid maize production
玉米雜交制種保質提質措施Management of the male in hybrid seed production of maize
對玉米雜交制種中父本的認識和管理Artifical crosses technique of pumpkin production
南瓜人工雜交制種技術Double - insurance hybrid seed production technique of cucumber
雜交制種技術High - yield hybrid seed production techniques of chinese cabbage
大白菜雜交制種高產技術Ways and measures for keeping the purity and production increase of hybrid corn seeds
淺談玉米雜交制種保純增產的主要途徑和措施Current status and development strategy for hybrid cotton seed multiplication industry in huimin county
惠民縣棉花雜交制種產業發展現狀與對策Seed production techniques of cucumber
黃瓜雜交制種技術5 - fu can influence the cell ' s survival through interference with the synthesis metabolism of the rna and dna. the intent of this research is to probe into the possibility of creating chemically controlled on - off male sterile plant lines, by using the characteristic of coda gene, and by consequnce, to establish a plant " two - line " hybrid production platform
5 - fu通過干擾rna和dna的合成代謝從而影響細胞的生存。本研究旨在利用coda基因的這一特性，探討創造植物雄性不育和保持「兼用系」的可能性，以期建立植物「兩系法」雜交制種的技術平臺。Pollination effects on the yield and quality of hybrid seed production of chinese cabbage by bees
蜂媒在大白菜雜交制種中授粉效益的研究與應用The key techniques including : the purity keeping of the hybrid ' s parents, hybrid seed production, and the seed purity identification by molecular marking
親本的保純與繁育技術，雜交制種技術，種子純度鑒定的分子標記技術。Study on production technique of hybrid seed of chinese cabbage
煙臺市大白菜雜交制種技術研究分享友人