In this paper,we consider the existence and uniquness of solution for Dirichlet problem of the Helmholtz equation on the domain with corners, i.e problemFor smooth boundary,we use potential theory to transform the problem into second kind boundary integral equation ,and use Fredholm alternative theorem,we obtain the existence and uniqueness of Dirichlet problem.

在本文中精品久久久久中文字幕，我們考慮邊界含尖點的有界區(qū)域上Helmholtz方程△u+k~2u=0的Dirichlet問題即問題與問題解的存在及唯一性一区二区日韩免费播放。

You can use like this and you are welcome to use it free of charge!

你可以使用這樣的歡迎您使用免費的！

Finally, the system through the use of green refrigeration for quality, a decrease of freon coolant use, and reduce the damage to the ozone layer, reflect ecological and environmental protection.

最后，系統(tǒng)通過使用綠色環(huán)保制冷工質综合欧美日韩，減少了氟利昂制冷劑的使用，減少對大氣臭氧層的破壞，體現(xiàn)生態(tài)和環(huán)保的理念91嫩草国产在线观看免费。

Compare to CK and RP without applying phosphate fertilize, growth status, frondage, bi omass,, phosphorus use efficiency of corn was increased and phosphorus use efficiency of root is especially high. Pot cultivation experiment results also shows: bioavailability and chemistry availability do not fit close.

這一趨勢變化也與苗期玉米試驗的結果基本吻合，說明改性磷礦粉的顆粒減小程度和粗糙程度的增加幅度和能與其生物有效性存在一定相關九九影院精品。

Characteristic: 1st, when water flowing not the pressure damages; 2nd, non-contact induction signal sample; 3rd, guards against the dripping of a water clock, the size current capacity does not have the error; 4th, the installment does not divide the direction; 5th, table when assembly the disposable tack-dry, prevented cheats; 6th, can generate electricity the outer loop work to use electricity voluntarily, lengthens the battery period of revolution; 7th, the battery can replace voluntarily, the magcard box and the battery box are equipped with the self-locking security function; 8th, has the magnetization to guard against the boiler scale function; 9th, this table lifelong does not use the dial gauge; When 10th, this table uses in the natural gas and the liquid gas, whether there is can in the automatic detection room the air noxious gas, if has can start the exhaust fan automatically (exhaust fan switch with this table connection), and the automatic shut-off table valve, plays the safe role; When 11th, this table uses in the warm air, according to the temperature, the time, the area cost, the temperature could not achieve the stipulation cost, the user cannot act according to own current economic condition to open at will stops, and is equipped with the frostproof function, to does not need the warm air the heating equipment not to be able for a long time to ruin by freezing.

特點：1亚洲综合色图网站、水流動時無壓損97在线超碰资源在线资；2天天摸天天爽视频69视频、非接觸感應信號取樣；3、防滴漏久久久久九九精品影院、大小流量沒有誤差欧美色色色；4、安裝不分方向；5、表在裝配時一次性粘固黄色网站在现免费看，防止作弊；6毛片免费看无码喷水高潮A、能自行發(fā)電補充電路工作用電国产黄色A片20分钟，延長電池使用時間国产在线观看黄A片免费网站；7、電池能自行更換，磁卡盒和電池盒設有自鎖防盜功能欧美激情第一欧美精品99；8欧美性a爱视频、具有磁化防水垢功能国产精品无码AV片；9羞羞漫画在线观看巨黄、該表終身不用校表91av在线观看91；10欧美在线视频首页、該表用于天然氣和液化氣時亚洲人妻不卡无码视频，能自動檢測室內(nèi)空氣有無有害氣體网友自拍日韩经典视频，如有能自動啟動排氣扇永久免费视频在线观看色黄，并自動關閉表閥欧洲免费AV在线网站观看，起到安全作用；11亚洲高清无码91、該表用于暖氣時，根據(jù)溫度、時間、面積計費，溫度達不到規(guī)定不計費，用戶可根據(jù)自己的經(jīng)濟條件隨意啟停，并設有防凍功能免费A级毛片视频网站，對長期不用暖氣的采暖設備不會凍壞一级毛片一级毛毛片免费看。

This scheme takes glass acrylics as the main material and frustum while lamps, light and shadow as the main shaping means. We believe that we should use a kind of "flowing" beauty to express the sense of freedom and good order, integrate materials and techniques and take full use of simple ways so as to give people a sense of dizzy smoothness not a kind of ostentatiousness.

本案中以玻璃壓克力為主材，為截體狼友在，而燈国产精品亚洲精品专区、光、影是主要的造型手段2021自拍偷拍视频，我們認為要將一種"流動"的美表現(xiàn)出淋漓有序的感覺日韩成人无码电影观看网址大全，利用材料和技法的相輔相成并通過樸實的手法自然的實現(xiàn)，才可能使人感受到一種眩目中的流暢熟女丰满少妇一级毛片，而不是一種浮華。

You can use these to achieve full-screen dialog box, and you can use it to switch to the other running applications.

用這類你可以實現(xiàn)全屏對話框欧美性爱网综合，并且你用它可以切換到運行的其它應用程序中欧美六九。

The author also expected that the era of multiple use of single fumigant would be replaced by those fumigants for special of a certain field use gradually.

由于它具有高效、穿透性強国产AV普通话对白国语、快速在线观看永久免费A片三皮、殺蟲譜廣等優(yōu)點十八以下勿进色禁网站永久，總體來說，被認為是和磷化氫一樣的氣體殺蟲劑的兩大支柱之一日韩一级电影WWW.COM。

In order to use the interesting furniture better, fun furniture in this article through the analysis of functional, space, color, texture and style lines and four areas of interest to describe the use of furniture.

為了更好的使用趣味性家具精品大片在线免费，本文通過對趣味性家具的分析，從功能国产在线黄色、空間在线观看AV资源站捆绑、色彩、線條和質感與風格四個方面來論述了趣味性家具的運用方法99re视频在线这里精品。

In order to better the use of interesting furniture, fun furniture in this article through the analysis of functional, space, color, texture and style lines and four areas of interest to describe the use of furniture.

趣味性家具在此背景下應運而生久久精品国产88久久综合。為了更好的使用趣味性家具，本文通過對趣味性家具的分析人妻亚洲一区，從功能欧美精品91一区二区在线观看、空間、色彩性爱视频网站入口、線條和質感與風格四個方面來論述了趣味性家具的運用方法超碰人人干人人摸人人看。