With the material dynamic constitutive equation including damage and the effect of stain rate the predictable formula about ballistic limit velocity of fiber composite target. secondly based on the damage feature about ceramic / fiber composite target caused by impact load, analysis model about defense performance of ceramic / composite material target is formed and the predictable formula about ballistic limit velocity is also given. lastly using the reflection and projectile theory of stress wave the paper discusses the design of ceramic / composite material target, optimizes the design of double layer ceramic / composite targets, gains optimal coefficient under certain area density and discusses the variety relationship of area density and thickness with optimal coefficient u nder some ballistic limit velocity 3
首先,分析了纖維類正交鋪層復合靶板在沖擊載荷作用下的損傷破壞機理,結合包含損傷和應變率效應的材料動態本構方程,建立了纖維復合材料板彈道極限速度的預測公式;其次,根據
陶瓷/纖維材料復合靶板在沖擊載荷下的破壞特點,建立了
陶瓷/復合材料靶板抗彈性能分析模型,給出了彈道極限速度預測公式;最後,利用應力波反射和透射理論討論了
陶瓷/復合材料靶板的設計問題,對雙層
陶瓷復合靶板的優化設計進行了分析,給出了在一定面密度下的最
佳優化系數,討論了一定彈道極限速度下的面密度和厚度隨優化系數的變化關系。
They are applied to different situations and verified by experiments. analysis model of small ap oblique penetrating ceramic / metal light armor is established on the basis of energy model and the assumption of ellipse absorbing the same energy in back plate, giving the predictable formula about ballistic limit velocity. with energy model the optimization design in relation to ceramic / metal light armor is analyzed and the optimal coefficient of ceramic / metal composite armor is gained
本文的主要研究內容如下: (一)建立了小型穿甲彈垂直侵徹
陶瓷/金屬輕型裝甲的動量模型和能量模型,它們分別適用不同情況,並通過試驗驗證;基於能量模型和背板橢圓吸能相同假設,建立了小型穿甲彈斜侵徹
陶瓷/金屬輕型裝甲的分析模型,給出了彈道極限速度預測公式;利用能量模型對
陶瓷/金屬輕型裝甲的優化設計進行了分析,給出了
陶瓷/金屬復合裝甲的最
佳優化系數。
I often sent pictures of the hills of guilin which i painted to friends back home, but few believed what they saw
這沁人心脾的幽香,令人
陶醉。 「桂林」這一
佳名,想必由此而來吧。
Processed by high - tech firing, traditional firing, metalworking, and partial mosaic gold, the dishware obtaining various surface designs is able to not only make you comfortable but also make you feel prominent
產品採用高科技的
陶瓷燒制工藝、傳統宮庭燒花藝術與不銹鋼精密加工、表面局部彩金工藝的完美結合,在設計上採用具有不同象徵意義的多款花卉圖案,讓你在方便使用的同時,造就個人品味與用具的最
佳組合,處處體現與眾不同。
Thats the highest goal of us. the following are all our main customers : wal - mart, coca cola, sanyo, shangri - la hotel, omron, star, canon, allied pacific food, toto, ichihiro towel, china hualu matsushita, fuji electric, china telecom, china mobile, china unicom, dalian market group, iceberg group, wanda group, daxian group, sun flora, petro china, merro medicine, shide group, feide, zhen - ao group, yucongrong, cosco group, every leading publishing house, magazine agency, etc. head adopted laser typesetting system in 1988, and in 1996 we invested 6 million rmb to establish the biggest color - printing and plate - making center in dalian, then introduced the advanced printing equipments from other countries, now it is the largest corporation of color - printing and plate - making, packing, publishing of books and periodicals in dalian. in order to meet
海大印刷的一些主要客戶:沃爾瑪可口可樂三洋香格里拉大飯店歐姆公司斯大
佳能公司中聯食品東
陶一廣毛巾中國華錄松下富士電機中國電信中國移動中國聯通大商集團冰山集團萬達集團大顯集團桑扶蘭中國石油美羅藥業實德集團非得生物珍奧集團,御蓯蓉中遠集團各大出版社雜志社等。
The disappointment and dreariness of tao yuan - ming was not only his failing ideality, but also his regret of son ' s no achievement
摘要
陶淵明身後的失望、蒼涼除了自己懷抱理想而無良辰
佳時外,還應有諸子不立的憾恨。
On the contrary, carved porcelain bloomed with objects imitating in porcelain of other material such as ivory, bamboo and stones, producing in quantity objects for the scholar s studio. with original designs and quality workmanship, potters made reputations for themselves and their studios, to name but a few, chen guozhi, wang bingrong and li yucheng
雕瓷就在這個時候發展,仿象牙、竹木、琢石雕刻,大量生產文房用品,在其他瓷器製品水平衰落之時,獨樹一幟,形成鮮明的
陶藝風格。名家如陳國治、王炳榮、李裕成等輩出,他們充分利用景德鎮瓷泥的特性,所制器物,屢有
佳作。
Wishing you all the joys of new year and a year of happiness
祝
佳節歡樂樂
陶陶,新年幸福無邊!
We decided to use the axial polarized model as our investigate object after comparing. with theoretical and emulational methods, we studied the properties of cymbal transducer are dependent of the dimensions of metal endcaps and pzt thinner circle plate. and obtained the optimized dimensions
採用理論和有限元模擬相結合的方法,研究了金屬端蓋和壓電
陶瓷片( pzt )的形狀參數對cymbal換能器的縱向位移及諧振頻率等性能的影響,確定了試樣的最
佳形狀參數。
Uniform and compact plzt and sno _ 2 ceramic targets, which diameter were 212mm and 221mm, respectively, had been successfully fabricated. ( 2 ) a rotating magnetic field rf magnetron sputtering system had been designed and set up, which showed high utilization efficiency of target, high films uniformity, and high deposition rate, etc. ( 3 ) the plzt and sno _ 2 thin films were investigated by afm, xrd, sem, and spectral photometer. the optimized processing parameters of preparing these films had been found
並以此為基礎分別制備了緻密、均勻、平整、直徑為212mm的plzt和221mm的sno _ 2
陶瓷濺射靶材; ( 2 )為克服現有磁控濺射設備的不足,提出了一種新的磁控濺射方案,採用該方案的設備具有:靶材利用率高、鍍膜均勻、成膜速度快等特點; ( 3 )運用afm 、 xrd 、 sem以及雙光路分光光度計等分析手段對plzt和sno _ 2薄膜的微結構和性能進行研究,找到了制備plzt電光薄膜和sno2透明電極材料的最
佳工藝條件。
Our super fine kaolin has the peculiarities of good fluidity and high plasticity, which is the optimal raw material of top grade ceramics
我公司生產的超細高嶺土,具有流動性好,可塑性高等特點,是高檔
陶瓷的最
佳原料。
In addition, guests enjoyed an array of exquisitely prepared international vegetarian foods, served on decorative ceramic plates
並款待大家享用由同修精心準備盛裝在藝術
陶盤的國際素食
佳肴。
Using this expression to calculate the optimum rare - earths oxides ( nd2o3, ceo2 and la2o3 ) content of zinc oxide varistor, the quantitative calculation results are in accordance with the experimental results approximately. the double shottky potentical barrier was showed in form of catoon using flash, from which we can comprehend the conduction theory of zinc oxide varistor. the electrical properties of varistor can be improved depend on it
運用固體物理、半導體和電子薄膜材料的相關理論,建立數學模型,推導出了最
佳摻雜含量的理論計算式,並將之推廣到高溫燒結的氧化鋅壓敏
陶瓷材料,運用這一計算式定量計算ndzo3 、 ceoz和lazo3等稀土摻雜的最
佳含量,計算結果與本文的實驗結果比較符合。
The properties of all samples were investigated, it is the same to the pzt ceramics, samples in the composition range of mpb exhibited best piezoelectric performance
測試了各組成點樣品的壓電性能,結果表明,與pzt基含鉛壓電
陶瓷相似,材料在準同型相界組成范圍內壓電性能最
佳。
We have developed many different kinds of beautiful elegant candle gift and home crafts, which suitable for different countries styles, and become a popular gift for u. k., germany, canada, poland, sweden, and u. s. a. to express a sincere wish to friends relatives
是一家專業生產有玻璃鐵藝木製品陶瓷搭配的蠟製品製造商,設計了大批美觀大方高雅顏色搭配恰當符合不同國家風格風俗的家居用品。 wish商標的禮品蠟燭更加代表一片真誠的祝福。成為英國德國加拿大波蘭瑞典美國等不同國家佳節禮品。