 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 2/1 | 返回列表 |
| 查看: 3481 | 回復(fù): 15 | |||
| 當(dāng)前只顯示滿足指定條件的回帖，點擊這里查看本話題的所有回帖 | |||
wutongshun金蟲 (正式寫手)
|
[求助]
用高斯09計算的tddft方法優(yōu)化激發(fā)態(tài)出現(xiàn)問題如何解決？
|
||
|
用高斯09計算的tddft方法優(yōu)化激發(fā)態(tài) #p opt=maxcyc=300 td(triplets,nstates=6,root=1) b3lyp/genecp 1 3 出錯信息是： You need to solve for more vectors in order to follow this state. Error termination via Lnk1e in /public1/soft/Gauss09/g09/l914.exe at Tue Apr 26 04:00:18 2011. 請教達(dá)人，如何解決？ |
回復(fù)此樓» 猜你喜歡
化學(xué)-化工-材料-食品-生物-環(huán)境2026年研究生調(diào)劑（可以不考數(shù)學(xué)）
已經(jīng)有0人回復(fù)
-
化學(xué)-化工-材料-食品-生物-環(huán)境-農(nóng)業(yè) 2026年研究生調(diào)劑（可以不考數(shù)學(xué)）
已經(jīng)有1人回復(fù)
-
物理化學(xué)論文潤色/翻譯怎么收費?
已經(jīng)有205人回復(fù)
-
070300一志愿211，312分求調(diào)劑院校
已經(jīng)有12人回復(fù)
-
26年儲能、電池方向博士申請
已經(jīng)有0人回復(fù)
-
070300化學(xué)求調(diào)劑
已經(jīng)有12人回復(fù)
-
青島大學(xué)化學(xué)化工學(xué)院2026年招收調(diào)劑碩士研究生
已經(jīng)有0人回復(fù)
-
北方工業(yè)大學(xué)085808儲能技術(shù)-02方向（電池）接收調(diào)劑生
已經(jīng)有0人回復(fù)
-
272求調(diào)劑，接受跨專業(yè)調(diào)劑！
已經(jīng)有3人回復(fù)
-
有一區(qū)TOP論文，求調(diào)劑
已經(jīng)有20人回復(fù)
-
大連工業(yè)大學(xué)杰青/長江團(tuán)隊-生物質(zhì)材料-儲能電池方向招收2026級博士生
已經(jīng)有8人回復(fù)
beefly
專家顧問 (職業(yè)作家)
地溝油冶煉專家
-
專家經(jīng)驗: +458 - QC強(qiáng)帖: 12
- 應(yīng)助: 88 (初中生)
- 金幣: 13026.2
- 散金: 27307
- 紅花: 300
- 帖子: 4673
- 在線: 927.1小時
- 蟲號: 408372
- 注冊: 2007-06-21
- 性別: GG
- 專業(yè): 理論和計算化學(xué)
- 管轄: 計算模擬
13樓2011-05-19 21:50:46
lihb734
鐵桿木蟲 (職業(yè)作家)
站在計算化學(xué)入門的門檻上
- QC強(qiáng)帖: 2
- 應(yīng)助: 132 (高中生)
- 金幣: 7495.4
- 散金: 9378
- 紅花: 74
- 帖子: 3107
- 在線: 1177.3小時
- 蟲號: 448403
- 注冊: 2007-11-01
- 性別: GG
- 專業(yè): 理論和計算化學(xué)
2樓2011-04-26 11:56:19
pwzhou
鐵桿木蟲 (正式寫手)
- QC強(qiáng)帖: 2
- 應(yīng)助: 51 (初中生)
- 金幣: 7551.4
- 散金: 13
- 紅花: 14
- 帖子: 412
- 在線: 316.9小時
- 蟲號: 56225
- 注冊: 2005-01-07
- 性別: GG
- 專業(yè): 化學(xué)動力學(xué)
【答案】應(yīng)助回帖
wutongshun(金幣+1): 2011-04-26 12:40:52
|
我再把Gaussian公司的回信附上來，希望這是最后一次有人問這個問題，我實在不記得這已經(jīng)是多少次有人問這一個同樣的問題了。問問題之前搜索一下很難嗎？ In the case of "No map to state **, you need to resolve more vectors" messages, this is usually an indication that one did not include enough excited states in the TD or CIS calculation. The "States=N" option to the "TD" or "CIS" keywords tells how many excited states to include in an excited state energy calculation. If this is not specified, the default value will be "States=3". The recommended value is to include a minimum of 2 or 3 more states than the state of interest. Thus, if you want to perform a geometry optimization for excited state 5, for example, I would recommend at least using "States=7" or "States=8". The geometry optimization will be done for one excited state M, selected with "Root=M", and one has to make sure that enough states are included in the CIS or TD expansion by having "States=N" where N is larger than M. It is possible that, at some point during an optimization of an excited state, the order of the excited states changes and the CIS or TD expansion might need to include more states in order to be able to follow correctly the state of interest. This is essentially what that message about including more vectors mean, that is that at that point, the number of states that you originally specified with "States=N" was not enough in order to solve for the state of interest, so a larger number "N" will need to be used for "States=N". Other times, the problem is that the ground state wavefunction becomes unstable, that is one of the states that was an excited at the initial geometry now becomes lower in energy than the state that was the ground state at the initial geometry. This kind of situation, unfortunately, cannot be modeled properly with single determinant expansions such as CIS or TD, and one would need to use CAS in order to be able to deal with the conical intersection or avoided crossing of states. Another thing to note is that one should be much more careful with geometry optimizations on excited states than for the ground state. Typically the energy differences among excited states are smaller than between the ground state and the first excited state. Thus, one can afford to perform larger geometry optimization steps when optimizing the ground state than in the case of optimizing an excited state. A "bad" geometry optimization step in the optimization of the ground state, may take you a bit off track but in following steps the optimization might find the way back and approach the converged structure. In the case of an optimization of an excited state, a "bad" geometry optimization step will also take you off track but, since other electronic states are close in energy, it is possible that at the new geometry the order of the excited states change and now the geometry optimization follows a different electronic state. This is not only a problem because the optimization could be pursuing a different state than the one you were interested in, but also because, if several of these changes occur during a geometry optimization, it may even be hopeless to continue with the optimization because the gradient information and the estimated hessian could be useless (since not all the previous points in the geometry optimization where points from the same potential energy surface). As a first measure to increase the reliability of the geometry optimization of excited states, I recommend to reduce the maximum allowed step size during geometry optimizations. Try "Opt=(MaxStep=10)" to set this value to 0.10 Bohr, or a smaller value if you still have problems. The default value is typically 0.30 Bohr. Reducing the maximum allowed step size will result in the geometry optimization taking more steps to reach convergence than with the default value. This will be true obviously for well-behaved geometry optimizations, but for problematic cases it will be the other way around, i.e. it will take fewer steps (and may even be impossible with the default step size) because it will be easier for the optimizer to follow a particular electronic state if the changes from step to step are not very drastic. |
3樓2011-04-26 12:02:55
wutongshun
金蟲 (正式寫手)
- 應(yīng)助: 4 (幼兒園)
- 金幣: 1654.7
- 散金: 49
- 紅花: 3
- 帖子: 303
- 在線: 116.1小時
- 蟲號: 542858
- 注冊: 2008-04-10
- 性別: GG
- 專業(yè): 無機(jī)材料化學(xué)
4樓2011-04-26 12:09:21
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[碩博家園] 求調(diào)劑 有機(jī)化學(xué)考研356分 +11 | Nadiums 2026-03-25 | 12/600 |
|
|---|---|---|---|---|
|
|
[考研] 求調(diào)劑 生物學(xué) 377分 +6 | zzll03 2026-03-31 | 6/300 |
|
|
[考研] 285求調(diào)劑 +6 | AZMK 2026-03-30 | 11/550 |
|
|
|
[考研]
 物理學(xué)調(diào)劑
+4
|
小羊36 2026-03-30 | 4/200 |
|
|
|
[基金申請] 面上5B能上會嗎？ +8 | redcom 2026-03-29 | 8/400 |
|
|
|
[考研] 282求調(diào)劑 不挑專業(yè) 求收留 +4 | Yam. 2026-03-30 | 5/250 |
|
|
|
[考研] 266分，求材料相關(guān)專業(yè)調(diào)劑 +10 | 哇呼哼呼哼 2026-03-30 | 12/600 |
|
|
|
[考研] 0856調(diào)劑 +6 | 曲聽筠 2026-03-30 | 6/300 |
|
|
|
[考研] 一志愿 南京航空航天大學(xué) ，080500材料科學(xué)與工程學(xué)碩 +5 | @taotao 2026-03-30 | 5/250 |
|
|
|
[考研] 370求調(diào)劑 +3 | 080700調(diào)劑 2026-03-30 | 3/150 |
|
|
|
[考研] 一志愿北京化工大學(xué)材料與化工（085600）296求調(diào)劑 +25 | 稻妻小編 2026-03-26 | 25/1250 |
|
|
|
[考研] 322求調(diào)劑 +10 | 宋明欣 2026-03-27 | 10/500 |
|
|
|
[考研] 328求調(diào)劑 +8 | 嗯滴的基本都 2026-03-27 | 8/400 |
|
|
|
[考研] 284求調(diào)劑 +14 | junqihahaha 2026-03-26 | 15/750 |
|
|
|
[考研] 327求調(diào)劑 +6 | 汲亦昊 2026-03-29 | 6/300 |
|
|
|
[考研] 349求調(diào)劑 +6 | 李木子啊哈哈 2026-03-25 | 6/300 |
|
|
|
[考研] 本科雙非材料，跨考一志愿華電085801電氣，283求調(diào)劑，任何專業(yè)都可以 +6 | 芝士雪baoo 2026-03-28 | 8/400 |
|
|
|
[考研] 求調(diào)劑 +4 | 零八# 2026-03-27 | 4/200 |
|
|
|
[考研] 化學(xué)調(diào)劑一志愿上海交通大學(xué)336分-本科上海211 +4 | 小魚愛有機(jī) 2026-03-25 | 4/200 |
|
|
|
[考研] 材料專碩 335 分求調(diào)劑 +4 | 拒絕冷暴力 2026-03-25 | 4/200 |
|