核探頭 的英文怎麼說
中文拼音 [hétàntóu]
核探頭
英文
nuclear log probe-
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。This article briefly introduce recent advance in nmr technology and application including high field magnets, shielding techniques, probe heads, analytical applications and methods in biomolecular nmr
本文將簡單介紹近幾年高磁場核磁共振的發展、磁場遮蔽技術的改進、探頭設計的突破以及在分析方法與生物巨分子方面的新應用。In analyzing the neutron active detection, the neutron multiplication in the nuclear warheads induced by outer neutron source with different neutron energys is studied with numeral simulation, and the feasibility of through counting neutrons to determine the presence of high enrichment uranium ( heu ) in nuclear warhead has been proved. the method of detecting the warhead which contains heu pit by counting the released neut rons whose energy is higher than that of source neutron is studied. the feasibility of this method has been studied
對幾種主動探測核彈頭方法進行的研究中,首先對不同能量各向同性外源中子照射核彈頭的中子增殖行為進行了數值模擬,檢驗了用外源中子照射核彈頭后,通過測量瞬發中子在核彈頭中的增殖量,來證明核彈頭中高濃鈾存在的可行性;研究了用能量低於1mev的外中子源照射核彈頭,用測量核彈頭中裂變產生的高於源中子能量中子數的方法探測核彈頭,通過數值模擬分析了可行性。The results of numeral simulation show that the higher - energy neutrons counting rate is quite low, it requires more counting time or much stronger low energy neutron source to detect the reliable signals
計算結果表明,核彈頭裂變產生的較高能的中子數很少,需要較長的時間或較強的低能中子源才能探測到可靠的信號。Nuclear warheads detection is an important verification technology for nuclear disarmament treaty in nuclear disarmament process, and this technology is also concerned to the national security interests
在核裁軍過程中,核彈頭探測是對核裁軍條約執行情況進行核查的重要內容,它涉及到國家重大安全利益。The results show that the method is better than the method of counting prompt neutrons in distinguishing real and fake nuclear warheads
數值模擬表明,這種方法比計數瞬發中子總數有較大的優點,可用來探測鈾為彈芯的核彈頭。A survey of literature shows that little study has been done on uptake of pollutants by plants from the polygonaceae, and that the reports about their physiological and biochemical characteristics under heavy metal stress were sporadically seen. a batch of sand culture and soil culture experiments were carried out to investigate heavy metal and radiocesium uptak e and accumulation by rumex acetosa linn, polygonum microcephalum d. don, and rumex hastatus d. don widely distributed on copper mining areas, and their physiological and biochemical characteristics under cu zn stress, as well their potentials in application to phytoremediation
本論文以廣泛生長于銅礦區的蓼科植物酸模、小頭蓼和戟葉酸模為試驗材料,運用砂培、土培等方法,研究它們對重金屬( cu 、 zn )以及放射性核素( ~ ( 134 ) cs )的吸收和積累特性以及cu 、 zn脅迫條件下它們的生理生化特徵,初步探討它們在無機污染物污染土壤植物修復中的應用潛力。Purpose : to demonstrate the value of multi detector computed tomography ( mdct ) and magnetic resonance imaging ( mri ) in the preoperative work up of temporal bone tumors and to present, especially, ct and mr image fusion for surgical planning and performance in computer assisted navigated neurosurgery of temporal bone tumors
目的論證多探頭計算機斷層掃描( mdct )和核磁共振成像( mri )在顳骨腫瘤手術前設計的價值,尤其是顳骨腫瘤計算機輔助導航神經外科手術路徑的設計。This testing system is based on the pxi bus virtual testing system. there are many secondary types of equipments in the system. such as the programmable power supply, high voltage probe, high voltage relay, high voltage load and pneumatics
本文以pxi總線虛擬測試系統為核心,輔以程式控制電壓源、高壓衰減探頭、高壓繼電器、高壓放電負載及氣動裝置,分別設計組裝了主機櫃與測試櫃,完成整個自動測試進程。In numeral simulation of passive neutron detection, it is proposed to use the iterative calculation in analyzing the neutron multiplication in nuclear warhead. on this basis, the mass of the plutonium pit could be obtained under some conditions
在被動中子探測數值模擬中,提出在確定了核彈頭的泄漏中子計數后,採用迭代方法計算中子在核彈頭模型中的增殖,由此在一定條件下可實施核彈頭質量屬性的反演。The results show that coincidence detection method has obvious benefit in detecting nuclear warheads. for the same type warhead, the coincidence counts rates of the model of warhead of heu pit is 10 times as big as that of fake warhead of natural uranium pit. if we know the nuclear warheads configuration by other methods, the method of coincidence neutron detection could be used to distinguis h the fake nuclear warheads from the reals
計算表明用探測符合中子的方法探測核彈頭對區分真假核彈頭有明顯的優點,對于同一核彈頭模型,裂變彈芯是高濃鈾和用天然鈾替代高濃鈾時,符合中子計數相差1個量級,如通過其他途徑了解核彈頭的大致結構,符合測量的方法就可以有較高的置信度分辨真假核彈頭。The first part is the general interface of the hardware, which drives, monitors the ultrasonic sensor, receives signals generated by the sensor, converts the analog signals into numerical formats and sends them to the computer through a communication line. the second part is concerned with designing and implementing the software to be used by the vi
第一部分是以單片機為核心的超聲波發射接收卡的設計,其作用是驅動超聲波探頭工作,接收材料中的缺陷超聲回波信號,將其轉換為計算機可以處理的數字信號,並通過通信總線發送給計算機。Detecting nuclear warhead by counting delayed neutrons induced by neutron source is studied. the 2 - step calculation method is proposed to resolve the delayed neutron transportation issue. this method can save computer ' s calculation time, and is easy to operate
本文研究了用外中子源照射核彈頭,誘發其裂變材料裂變,探測緩發中子的方法,以此判斷高濃鈾與低濃鈾,從而為核查核彈頭的真偽提供依據。With the outer neutron source which can only induce 235u fission, it could possibly prove the presence of heu in a warhead by counting the coincidence neutrons. this method possibly provides one of necessary attributions in identifying the real nuclear warheads
本文研究了用中子符合探測方式測量能量低於1mev的外中子源在核彈頭中誘發的裂變數,以判別模型中是否含有高濃鈾,從而作為判斷核彈頭的真偽的可行性。In this paper, by neutron radiation detection with the passive method, the study on detectability, neutron spectra, etc. for the plutonium combined systems including the stimulated nuclear warhead assembly are introduced
摘要介紹了通過探測中子輻射,用被動方法研究了包括模擬核彈頭裝置在內的各杯組合系統的可探測性和中子能譜等內容。Microwave power sensor is the core component of microwave power meter , and it has been researched by many domestic and overseas research institutions, but micro - structure microwave power sensor developed by using mems technology is few yet. in this paper, design and fabrication of a new chip of microbridge structure thermocouple type microwave power sensor developed by using mems technology were recommended
微波功率傳感器是微波功率計探頭中的核心元件,在該領域國內外已有大量的研究,但利用mems技術研製的微結構微波功率傳感器至今還很少,本文主要介紹了一種用mems技術研製的微梁結構熱偶微波功率傳感器晶元的設計和製作工藝。Because the nuclear disarmament verification technologies are quite complex, particularly the technology for nuclear warhead detection is very difficult, and it concerns to the sensitive issues such as national security and nonproliferation of nuclear weapons, it would be benefitial for china to explore the technology of nuclear warhead detection before participating in the nuclear disarmament process
由於核裁軍的核查技術復雜,特別是核彈頭的探測技術復雜,難度大,涉及國家的安全和國際核不擴散等敏感問題,因此在中國參加核裁軍之前開展核查技術中的核彈頭探測技術研究是一項非常重要的技術儲備。The first part discusses the base and necessity of the paper, review of the technique home and abroad, market demand analysis, available conditions and main work finished ; the second part is the core of this paper and discusses the detail of how to make the micro optic life explorer ; the third part introduces the optic - electric imaging theory ; the fifth part discusses the process and display of video image, circuit of video information process, pip video display technique and lcd display technique ; the sixth part discusses the relative content about wireless spread spectrum theory, a necessary theoretical supplement of lift exploring system ; the last part is the conclusions of the paper, summarizes experiences gotten during the research of lift explorer, gives some advices on how to perfect the system and the market prospect of lift explorers
第一部分論述了選題依據和必要性,國內外現狀和技術發展趨勢,市場需求分析,現有基礎條件和本人所做的主要工作等;第二、四部分是微型光學探生儀的詳細研製過程,從系統設計方案、設計思路到系統整機集成進行了逐一分析介紹,是本文的核心內容。第三部分是對主探頭的光電成像理論進行介紹。第五個部份討論了視頻圖像處理與顯示,介紹了ccd視頻信號處理電路, pip視頻顯示技術和液晶屏顯示技術。Nuclear cardiac probe
核子心臟探頭The core of the coder is microcontroller - at89c51, the hardware circuits include two parts : display circuit, keys circuit, used for writing detectors ’ id and transmission channels codes
寫碼器以at89c51為核心,硬體電路包括顯示介面、按鍵設計兩個部分,主要用來為探測器寫探頭編號和無線傳輸的通道。分享友人