In view of bearing capacity of the elastoplastic theory analysis, the author made a comparison between the achieved bearing capacity limit load pi / 4 of round base ( space problem ) and the limit load pi / 4 of bar groundwork foundation design ( plane problem ) from soil mechanics at home and abroad as well as foundation criterion, and explained why the value of formula in present design criterion from soil mechanics is inclined to be conservative. in the light of the author ' s many years experience of vibration test on the spot and the research work of relevant projects, the author worked over the dynamic pile testing of the bearing capacity of foundation and batholith, and gathered the parameter of dynamic analysis and testing. the author also talked over the difficult point of pile foundation design criteria in present batholith engineering world, i. e. the confirmation of batholith bearing capacity of pile end, from the following aspects : a ) confirmation of single axis counter - pressure strength of rock in house ; b ) f. e. m calculation of elastoplastic model ; c ) calculation of soil mechanics ; d ) deep well load test
然後,對巖土工程領域至今尚未解決,甚至不為人注意的考慮地基變形的地基承載力問題進行了實用化的探討,提出了考慮地基變形的地基承載力上程計算方法;對基於彈塑性理論分析的地基承載力國內尚未見報道的空間問題得到了圓形基礎(空間問題)的承載力界限
荷載p _ ( 1 / 4 ) ,並與國內外土力學專著及地基基礎設計規范中的條形基礎(平面問題)的界限
荷載p _ ( 1 / 4 ) ,進行了對比,從而定量上解釋了目前設計規范引用土力學承載力公式值偏於保守的這一情況;根據本文作者多年從事現場地基工程振動試驗及相關課題的研究工作,本文以截頭錐模型模擬地基,對地基(巖基)承載力的動測法進行了研究,為各類地基(包括巖基) ,匯總了動力分析和檢測川的參數:針對日前巖土工程界應用樁基設計規范中的難點? ?樁端巖基承載力的確定問題,從巖石室內單軸抗壓強
度確定、基於彈塑性模型的有限單元法計算、土力學計算及深斤載
荷試驗四方面進行了深入討論;本文作者根據多年現場載
荷試驗的工程實踐,對深井
荷試驗裝置的核心部分? ?反力裝置,設計了側壁支撐反力加載系統,該加載系統具有實用、簡便、穩定及安個等優點。
Advices : during the training time you should use the rneasurment of heartrate very efficenly to control the arrangement of burthen intensity
建議:在運動訓練過程中應該運用心率的測量有效的控制負
荷強
度的安排。
At a definite temperature a mesoscopic circuit isnt in a determinate quantum state instead of in the mixed state ( or statistical state ). using the density matrix of the canonical ensemble, we have deduced the formulate of the quantum fluctuations of both charge and current in a non - dissipative mesoscopic coupled circuit. and the dependences of the quantum fluctuation of the circuit on its temperature have obtained
在有限溫
度下,介觀電路系統實際上並不處在一個確定的量子狀態,而是處在混合態.根據正則系綜的密
度矩陣導出耦合互感電路中電
荷和電流的量子漲落,得到了量子漲落與溫
度的依賴關系
Vertical elements carry sufficient load through cantilever action to produce cantilever deflections equal to arch deflections.
垂直桿件則借懸臂作用產生和拱撓
度相等的懸臂撓
度,來承擔足夠的
荷載。
Finally, with caparisons of that three parapets properties cantilevered parapets has been adopt to the steel structure of light - weight buildings with gabled frames, numerical simulations have been carried out with that buildings, results of simulations show that device can also significantly reduce the area - averaged coefficient of wind pressure and high negative suction peaks on zones susceptible to wind pressure. formula has been proposed about the height of that parapet
最後通過三種女兒墻的性能比較確定對門式剛架設置懸挑女兒墻進行數值模擬,結果同樣表明懸挑女兒墻能明顯地降低門式剛架屋面風
荷載敏感區的負壓峰值及屋面風
荷載體型系數,並給出了女兒墻高
度限值公式。
With carbureted high - strength good - quality alloy, the series has the feature of high - efficiency and long life - span, high permissible axial and radial loads, low noise, high reliability and compact structure and so on configuration modality
採用高強
度優質合金鋼滲碳游淬火,具有高效率高壽命輪及高許用軸向,徑向載
荷,運行噪音低,可靠性高,結構緊湊等優點。
First, a simple discussion for the mechanism about electrostatic atomization of the liquids has been given ; then the paper theoretically analyzed waving course, liquid drop producing course, and the liquid drop diffusing course in electrostatics atomization process., gave an analysis about the methods about carrying charges to the liquid drop, and analyzed that liquid with high electrical conductivity can be carried charges and atomized by electric field, while the isolated liquid with low electrical conductivity can be charged fully with the soakage electrode and inducing charge methods. at last the paper designed and configured the experimental equipment, conducted the atomization experiment to the three liquid medium - kerosene, emulsifier and alcohol under the same environment, handled the experimental results, then summarized the relationship between liquid electrostatic atomization effect and liquid surface tension, electronic conductivity and viscosity, along with the influence of voltage to electrostatic atomization and so on, found out the liquid atomization rule in high voltage electrostatic field
首先,對液體介質的靜電霧化機理作了初步的探討,理論上分析了液體霧化過程中射流區、波紋區、霧滴區和霧滴擴散區;然後對液體
荷電方法進行了研究分析,對于高電導率的液體,場致
荷電和接觸
荷電可以使其霧化,而對于電導率較低的絕緣液體,需用浸潤電極
荷電和感應
荷電方法使其充分帶電;最後,根據前面的研究分析,設計和組裝試驗裝置,在同一環境下對煤油、乳化劑、酒精三種不同液體介質進行高壓靜電霧化試驗,並對試驗結果進行分析處理,總結出液體靜電霧化與液體表面張力、電導率和粘
度的關系及電壓對液體靜電霧化的影響等,得出高壓靜電場中液體霧化的一般規律。
Tf _ the allowed torque according to tired intensity in changeful load
在交變負
荷下按疲勞強
度所允許的轉矩。
By analyzed interactions of combined limit pipe load components, simplified check formula for pipe load strength are put forward and the calculation method of relevant allowable pipe load values based on shell finite element analysis is presented as well
通過對組合極限接管載
荷分量相互關系的分析,提出了接管載
荷強
度驗算簡化公式和以殼結構有限元應力分析為基礎的許用接管載
荷計算方法。
A white led driver circuit is presented in this paper. the circuit drives up to four white leds with regulated constant current for uniform intensity. by utilizing proprietary adaptive 1x / 1. 5x modes and ultra - low - dropout current regulators, it maintains the highest possible efficiency over the full 1 - cell li + battery input voltage range
整體電路以恆定電流驅動4隻白光led ,利用1倍/ 1 . 5倍分數型電
荷泵和低壓差電流調節器,在整個鋰電池供電電壓范圍內保持最高的效率,並使四個白光led獲得均勻的亮
度。
Since a carbon nucleus is six times more positively charged than a hydrogen nucleus, the cno cycle can only operate at the higher temperature and density provided by the more massive stars
但因碳原子核帶的電
荷是氫原子核的六倍碳氮氧循環需要只有質量大星體所能提供的較高溫
度和壓力才能維持。
That is the premise of the bg / ha electrophoresis codeposition. the laws of the electrophoresis deposition of the bg and ha partic les were found by the study on each of their deposition under the different conditions. the electrophoresis codeposition of the bg and ha particles had been studied and the bg / ha graded coating, which is compact in the bottom layer and porous near the surface layer, had been prepared on the surface of the dental implant after the low temperature heat treatment ( about 740 ) and fast firing ( 50 - 80 / min, heat preservation time was 5 - 8min. )
以bg微粉和ha微粉作為塗層原料,通過研究bg和ha微粉在非水介質中的分散情況和帶電特性,選擇冰醋酸為介質,使分散在其中的bg顆粒和ha顆粒表面均帶上正電
荷,為電泳共沉積提供前提條件;通過對不同條件下bg 、 ha各自電泳沉積的研究,探索出了兩者電泳沉積的規律;通過對bg和ha在冰醋酸中電泳共沉積以及后續低溫( 740左右)快燒( 50 ? 80 min ,保溫5 ? 8min )熱處理的研究,在鈦合金牙根種植體基體上成功制備出了底層緻密而表層多孔的bg ha梯
度塗層。
Chapter 3 and 4 researches soil depurating function and rule to rainwater by soil columniation penetrating examination on the basis of the two former chapters. and it analyses the influence of soil structure, contamination burthen and penetrating deepness to depurating effect, and discusses contaminate cumulation and renewing ability of soil
第三章和第四章在前兩章的基礎上,通過土壤柱滲透試驗,研究了雨水在土壤中的凈化作用及其規律,分析了土壤結構、污染物負
荷、滲透深
度對土壤凈化效果的影響,並對污染物的累積和土壤凈化能力的恢復進行了探討。
The results showed that extract of m. arvensis had a stronger inhibitory effect to u. virens than e. helioswpia, at 10 % of concentration, the inhibition rate to the germination of chlamdospore and conidiospore of extract of m. arvensis are all 100 %, while that of e. helioswpia were 14. 79 % and 7. 23 %
結果表明,薄
荷提取液對病菌的抑制效果較好,在10 %濃
度下對厚垣孢子和分生孢子的抑制達100 % ,而澤漆提取液的抑制率分別為14 . 79 %和7 . 23 % 。
Contour map of charge density
電
荷密
度等值線圖
Directed against the problem on confirming vertical bearing capacity of large diameter cast - in - place pile in the west of coteau area of yunnan province, the paper, analyses the influence degree of the variety of soil physics and mechanics property in area geology condition on bearing capacity of pile foundation, through 5 piles " loading test ; the influence degree of construction technics on bearing capacity of pile foundation under the influence of every exterior factors ; the influence degree of grouting injection around the pile shaft on bearing capacity of pile foundation
本文針對滇西山區大直徑灌注樁豎向承載力確定存在的問題,進行了5根試樁的靜載
荷試驗,分析了區域地質條件下土的物理、力學性質的變化對橋梁樁基承載力的影響程
度;地下水對樁承載力的影響程
度;各種外部因素影響下,樁的施工工藝對樁承載力的影響程
度;通過在樁體周圍土中注漿對樁承載力的影響程
度。
This dissertation handles the driving information model as the origin, leads into the concept of driving expectation speed and road supply speed, define the concept ? ffset between transferring rate of driving expectation speed and road supply speed ? as the key index of road safety level
本文以駕車人的信息處理模型為切入點,探討了駕駛行為中的信息負荷度的度量指標,引入了駕駛期望車速與道路供給車速的概念,繼而推導並確立了「駕駛期望車速與道路供給車速的轉換頻度的離差」作為衡量道路安全水平的核心指標。