First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in ug software. the elastic contact problem is analyzed in finite element method ( fem ) and is used to the parameters " distribution and contact stress of the joint are obtained on the base of ansys code. with the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high / low cycle complex load is proposed
本文介紹了微動損傷的機理和微動疲勞壽命的研究方法;利用ug軟體對燕
尾榫聯接結構創建了參數化實體模型;基於ansys軟體平臺求解彈性接觸問題,獲得了榫聯接結構接觸應力及接觸狀態量的分佈;在已有微動疲勞壽命預測模型的基礎上,引入載荷頻率影響因子,對低周、高低周復合載荷作用下的燕
尾榫聯接結構進行了微動疲勞壽命的預測,與試驗結果對比表
明採用本文提出的方法預測榫聯接結構的微動疲勞壽命是有效的。
If the cocktail dresses suits oneself, regardless of is reveals the muscle, the brilliant color, lofty perhaps has the decoration, all has not related
燕
尾服假如適合自己,無論是露出肌肉的
明色的高雅的或是有裝飾的,都沒有關系。
Additional, still have large intestine cancer, especially right half colonic cancer, often have the appearance that constipation and diarrhoea appear alternately, test of defecate concealed blood lasts electropositive ( demonstrative far end is colonic have haemorrhage ), some can touch in right abdomen reach bump, accompany have tenderness, constant fallibility examine is wrapped for appendix piece
另外,還有大腸癌,非凡是右半結腸癌,常有便秘和腹瀉交替出現的現象,大便隱血試驗持續陽性(說
明遠端結腸有出血) ,有的在右腹部可捫及腫塊,並伴有壓痛,常易誤診為闌
尾包塊。
Only the plants were infested by p. xylostella or being infested by p. xylostellam, the volatiles from chinese cabbage were more attractive to females than those from the common cabbage. ( 5 ) the host foraging behaviour of d. semiclausum was studied in the laboratory. the p. xylostella larvae and their feces, silk, regurgitant, exuviae could elicit host foraging behaviour by d. semiclausum females
本文首次研究了寄主植物的揮發物在小菜蛾和半閉彎
尾姬蜂寄主選擇中的作用,初步
明確了小菜峨及半閉彎
尾姬蜂對不同寄主植物產卵選擇行為差異的化學基礎,並對半閉彎
尾姬蜂的寄主搜索行為及學習行為進行了首次研究。
Cluster analysis based on rapd showed that at 76 % similarity level, all tested isolated could be clusted into nine groups, i. e. 1 p. ostreatus and p. florida, ii p. ostreatm p. sapidus, p. spodoleucus and p. eryngii, iii p. colnmbinus, p. corlicalus, p. cornucopiae, p. nebrodensis and p. ferulae ; iv p. pulmonarius and p. sajor - caju, v three isolates with indefinite species, vi p. luber - regium, vii p. cilrinopileatus, viii p. djamor and p. salmoneoslramincus, ix p. abalonus and p. cysliodism. 4. a single uniform product 1. 46kb in size resulted from pcr amplification of the 5 " half of the 28s rrna gene for all isolates of pleurolus and the other three genera
隨機擴增多態性dna的聚類分析表
明,在76相似水平下,可將供試的側耳菌株聚成九大類,第一大類包括糙皮側耳、佛羅里達側耳;第二大類包括美味側耳、灰白側耳、剌芹側耳;第三大類包括哥倫比亞側耳、裂皮側耳、黃白側耳、阿魏蘑、白阿魏蘑;第四大類包括肺形側耳和鳳
尾菇;第五大類為3株未定名的側耳;第六大類僅有具核側耳;第七大類為金頂側耳;第八大類包括紅平菇和桃紅側耳;第九大類包括鮑魚菇和囊蓋側耳。
The second one is poplar wood ( 3. 41 mj / m2 ), and the chinese fir wood has the lowest polar free energy ( 0. 74 mj / m2 ). the result of the surface polar free energy has shown the hydrophilic adsorption of the wood surface
這一結果表
明不同木材表面對極性的小分子物質(如水分子)有不同的吸附能力,其中馬
尾松木材表面對水分的親和性較強。
Chang zhou ming yang the car accessories limited company is a profession to produce every kind of car type top tail clear water pot, wash away dirt pot well ventilated tube, brake oil cup etc. heavy type the fuel on the car a freshet a tool box. every kind of hollowness blow the a business enterprise for producting, and every kind of combination tool box etc. product, the product category is numerous, the equipments is well - found, through the experience backlog of few decadeses, the product quantity promotes continuously, the production scale extends gradually, can produce the specification minimum 50 grams of, biggest 15000 grams of, length is 1. 6 hollowness of rices blows a pack. product regardless in molding tool design, or production line, all already beyond the reach of the domestic goes together. my factory can also according to customer the need of the product specification, color and luster, come to kind design to order the system
常州市
明煬汽車配件有限公司是專業生產各種車型上
尾翼清水壺,洗滌壺通風管剎車油杯等。重型汽車上的燃油箱澎漲水箱塑料工具箱。各種中空吹塑箱包製品及各種組合工具箱等產品的企業,產品種類繁多,設備全,經過數十年的經驗積累,產品質量不斷提升,生產規模逐步擴大,能生產規格最小50克,最大15000克,長度為1 . 6米的中空吹塑產品。
The calculated result from an example shows that the stable sectional area reduces with the increase of working head, or the decrease of the tailrace tunnel length
計算結果表
明,
尾水調壓室斷面面積隨水輪機工作水頭的增大或
尾水洞長度的縮短而減小。
Analysis for the product hydration process of natural maintenance show tailings and quartz sand surface is advantage for the major influence of hydration outcome in jing pei generate " base role ", do not participate in chemical reaction basically, while steam temperature and pressure for hydration structure and form of low silicon - tailings aerocrete have obvious influence, it is why the compressive strength of two products have obvious difference
對自然養護的製品水化過程分析的研究表明,尾礦和石英砂表面對於水化產物的主要影響是利於晶胚生成的「基底作用」 ,基本不參與化學反應,而蒸壓溫度和壓力對低硅尾礦加氣混凝土水化產物的結構、形態有著明顯的影響,導致兩種製品的抗壓強度有明顯差別。